Logical Arguments - Modus Ponens & Modus Tollens

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Modus Ponens and Modus Tollens are two logical argument forms. In either case, these have two premises and a conclusion. These argument forms are called valid, which means that if you accept the hypotheses, then it is valid to conclude the conclusion. This is distinct from having a sound argument which means not only is the structure logically valid, but additionally the premises are true. In this video we will learn how to analyze a written argument by its logical structure, as well as write out the truth table for Modus Ponens and Modus Tollens.
Modus Ponens:
if p, then q
p
Therefore, q
Modus Tollens:
If p, then q
Not q,
Therefore, Not p.
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Опубликовано:

14 окт 2024

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Комментарии : 215

@SoupTurtle16 4 года назад

This really helps me out during coronavirus times, where I don't get very clear descriptions because remote learning.

@NotAnnaJones 4 года назад

Yep

@thinkinsidetheboxsquarecir3303 3 года назад

It should also help see thru the absurdities and measures by governments surrounding this Fauxvid-19 😌

@skellingtonmeteoryballoon 3 года назад

Absolutely

@programming3218 2 года назад

@@thinkinsidetheboxsquarecir3303 Did your stupidity age well? Or are you still doubled down

@PhilSophia-ox7ep 3 месяца назад

@@thinkinsidetheboxsquarecir3303 crackpot

@Ben_Yamin_OfficialBw 4 года назад

I study computer science and software engineering in Botswana(Africa) and your videos are really helpful...A job well done to you sir for touching lives across the globe❤🖤

@KarlEngels-ml3lh 3 года назад

You are a godsend! RU-vid's sparsely populated in terms of philosophy videos, so seeing this was quite appreciated -- not to mention refreshing

@rahultayal9275 4 года назад

Again sir, Your eagerness to get intuition about any mathematical concept and come with the correct intuition ,is the thing that makes you great and special. Thank you sir for this masterpiece.

@ramyhuber8392 2 года назад

I so much appreciate the detail and clarity of Dr. Bazett's teaching. I remember I used to get upset when I felt a teacher skipped a step in the logical progression from hypotheses to conclusions. Thanks much!

@tyrael864 5 лет назад

I study Information and Technology in Poland and it seemed helpful to me aswell, so you do in fact help students around the globe!

@Godrick420 4 года назад

Thank you. I failed to grasp this from the text in my online critical thinking course. You cleared it up in a succinct but informative way. Keep up the good work.

@DarkMelodies-hv9wf 5 лет назад

I'm just trying to figure out how on this world he has that technology with his youtube vids damnn

@gui-mendes-nomad 5 лет назад

kkkk oh yes idem

@skygeorge3638 5 лет назад

A glass plate and editing software?

@seanliu3549 5 лет назад

free tay k

@cassidyhull8312 5 лет назад

is he writing backwards, impressed.

@zebafatima7688 4 года назад

@@DrTrefor 😂🤫

@jwross2798 3 года назад

I teach this and you just raised the bar for learning resources with an awesome video! I'm sharing the link to this with my argument mapping students when we discuss defeasible modus ponens schemes. Awesome!

@DrTrefor 3 года назад

Thanks, that's awesome!

@jackfeuer3323 Год назад

Currently a cadet at USMA. This has been much more helpful than my instructor. Thank you so much.

@goddessmamii 5 лет назад

Thank you so much, I honestly understand this so much better than my textbook explains this! 🙏🙌

@pendaydorji3403 2 года назад

very interesting way of teaching. The one I couldn't understand with two hours of class, this vid made me understand within 8 min.

@emmanuel4906 Год назад

This man is good,but couldn't get the actual concept so I intended to search for other RU-vid videos about Modus ponens and Modus Tollens. Until I found a channel named "the wisdom annex", which helped me a lot.

@hadleystrickland6066 3 года назад

Thank you I was so lost with this concept you made it so much easier to understand!!

@DrTrefor 3 года назад

You're very welcome!

@mrboyban 3 года назад

Hey mate You're a truly hero! I "subscribed" myself on a "top uni", which assumes students have to know all the proofs on a weekly basis after receiving no guidance at all on the topics. You have made easier for this week. Thank you so much

@DrTrefor 3 года назад

Thanks so much and good luck this semester!

@barbarakabanos2989 6 лет назад

I like how you showed us where the variables are in the sentence

@Sahebaaz75 4 года назад

I'm from India and it was pretty tough to understand it from the books, but your video made me understand it. Thanks.

@hanzfranz7739 3 года назад

You should get the 1000 bucks I pay each month and not the university which sent me a copy and pasted script that doesn't explain anything lol.

@randyn1080 Год назад

For. Real.

@coimbralaw 10 месяцев назад

Or you shouldn’t be lazy and actually engage the text

@Quietlamacakes 4 месяца назад

@@coimbralawyou can do that, it’s rather inefficient for social creatures.

@SpadeMonroe 6 лет назад

This is super helpful, especially because you look so much like Jack Whitehall, but without the british accent.

@black_godfred 2 года назад

writing an exam on expert system, we had a class on this, refreshing my mind with the video before the exam. exam starts in an hour. wish me goodluck

@willianrom 7 лет назад

I'm a brazilian student of I.T. and I wasn't understanding that. Thank you for your video.

@miltonjunior9553 4 месяца назад

Pensava que eu era o unico Br 😅

@pratyushtiwari9025 2 года назад

Dear Sir, Your explanation was amazing

@Roshan-xd5tl 3 года назад

Beautifully explained like always. Thank you!!

@UNKPCRIDE 5 лет назад

Conjunction /\ = TRUE only when both components are true Disjunction \/ = FALSE only when both components are false Conditional --> FALSE only when antecedent is TRUE and consequent is False Bi-Conditional TRUE only when both antecedent and consequent have the same truth value ~p = IS NOT /\ = AND \/ = OR

@shortyandthegrooves5515 5 лет назад

UNKPCRIDE Thank you. Been looking for these all over the internet but I’m stupid. Might just pass this exam now lmao.

@shannoncharles2165 4 года назад

Thank you so much

@Chrisymcmb 4 года назад

Why does he have p=f and q=f resulting in a p->q=T premise? I thought "Disjunction \/ = FALSE only when both components are false". Should not the premise for the above example be p->q=F?

@caitlinmurphy692 4 года назад

I think you just saved my life😂

@BigBrothersEnd 4 года назад

Thank you so much Trefor, you really make discrete maths fun like they should be

@DrTrefor 4 года назад

Glad you think so!

@laxmidokania7348 4 года назад

Good work trefor. Thank you ❤🌹 love from india

@3tranger 7 лет назад

that's exactly what i needed ! a Canadian who doesn't want to be POTUS....

@orinabraison2217 Год назад

brilliant teaching skill.

@EnGamology 4 года назад

I found a new way of teaching. awesome. really awesome

@canadianbro9327 3 года назад

Tomorrow is my final exam from Fuzzy Control. Thanks for information 🙋🏻‍♂️

@ArinaLove444 Год назад

Thanks so much for posting this, it has definitely helped me!!

@marceloantonio4819 5 лет назад

thanks for teaching me all this stuff in eighth minutes

@Hgh38 4 года назад

This man is a god

@fernleystephens2436 4 года назад

And we do all that in a split second when we're deciding whether to cross a busy road or not.

@nabeelahmed7626 3 года назад

thank you so much, sir, you just filled the gap in my mind in just 8-minutes video stay blessed

@NienHung1234 2 месяца назад

You just saved me from discrete mathematics... ❤❤

@arjunmurugan8759 4 года назад

Thanks a lot sir, this really helped me and btw u look-alike pewdiepie

@birajedits8259 2 года назад

Perfectly explained. Thanks alot.

@gdemrakul2824 Год назад

Thank you for doing these videos. They are really helpfull.

@youssefdirani 2 года назад

I felt cheered with all this. Modua pollens is probably the Aristotle logic ?

@biancamorar3339 8 месяцев назад

this really helped me thank you dude , you are great

@echozhao4096 3 года назад

I love your course. It really helps a lot!

@DrTrefor 3 года назад

So glad it is helping!

@DeepakChauhan-xh2jj 5 лет назад

very well explained & easy to follow. Great Job Man

@josephsilavwe1391 3 года назад

Wow what a wonderful explanation

@rlys4lty 2 года назад

Thank you for such a lifesaving video

@alphamega3306 3 года назад

Nice. You’ve found your niche. Tens, if not hundreds, of thousands of $ spent on college for an explanation with no proof; then I go on RU-vid and it’s explained perfectly for free.

@jackolson7071 4 года назад

These videos are very helpful, thank you

@DrTrefor 4 года назад

Glad to hear that!

@naturehubby 3 года назад

thank you sir for your so much efforts

@abigailcacho7488 3 года назад

Hi, this video is very helpful. I have a question sir, what if the form of argument is like this If p, then q. ~p Therefore, ~q Hoping for your answer, sir! Have a good day!

@Riccicc 4 года назад

Hello!! I can't find the Playlist for this course, I'm loving your videos: D Could you please provide it to me in advance Thank you

@DrTrefor 4 года назад

Check out the description for all the vids. Shortcut: ru-vid.com/group/PLHXZ9OQGMqxersk8fUxiUMSIx0DBqsKZS

@selenakadri7595 2 года назад

This lesson was extremly useful. Thanks a lot

@Eltricosluis 5 лет назад

HELLO. I AM BRAZILIAN AND I WAS FIND THIS CLASS. I LIKE VERY MUTCH. THIS WILL BE HELP ME. THANK YOU AND SORRY ABOUT MY INGLISH.

@al-noor9041 Год назад

Thank You for clear crystal concept.

@continnum_radhe-radhe Год назад

Thank you very much sir 🔥

@tendaizvikomboreroparaffin3925 6 лет назад

Trefor Bazett thank you, you're appreciated greatly.

@The_Advent_c2 3 года назад

Is there another argument form which states “if p then q” not p therefore, not q?”

@mokhalishale7427 Год назад

thank you so much ❤💯 really appreciate your good work

@induminidilukshaWijesinghe 2 года назад

These vedios are very helpful.. 😍Thanks a lot sir!! ♥️🙏💐

@johnlovesmath 3 года назад

Thank you for the high quality lesson.

@Reyure11 2 года назад

thank u, I more of understand what was the difference because we have to report this in class

@akifejaz5158 4 года назад

hurray! Got it

@shakibridoy5442 6 лет назад

Very carefully & the example is so good.

@sydneytomlinson 3 года назад

Called it! I could tell you were Canadian because you kinda talk like Dawid Does Tech.

@rachitaurora 2 года назад

thank you!

@anujsoni7908 6 лет назад

Best tutor ever seen...💐💐 thank you

@theonlyhans3773 2 года назад

thanks man!

@Scoomi_gh1 3 года назад

please want to ask what if the first premises and conclusion is false but the last premises and the last conclusion is true would the statement be valid or invalid

@reemabdullah7229 5 лет назад

soooooooo amazing Trefor, keep going :)

@farihanishat9795 3 года назад

Thankyou so much! ❤️

@juliaglocka119 4 года назад

Do you write it oppositely on the transparent board? :O

@martinds93 6 лет назад

Thank you. I understood you better than to my teacher...

@vishmanthapb3349 6 лет назад

you are awesome in teaching. thank you.

@bigkahunaburger2431 3 года назад

This helped me a lot... Thanks.

@DrTrefor 3 года назад

Glad it helped!

@matthewmarkiewicz4056 6 дней назад

Thank you for this excellent explanation!✌🏼❤️🙏🏼 So much better than the textbook and professor of my Philosophy 300 class explained basic argument formula. But no worries eh? They only require correct knowledge of what they haven't explained adequately on quizzes and exams for your grade. Lmao😆🤣

@demitrireece2489 4 года назад

great video man! keep it up :)

@DrTrefor 4 года назад

Thanks, will do!

@marvel438 6 лет назад

Thank man. Great explanation.

@nekomaru3679 4 года назад

It doesn't matter means false? at 5:50 ~. I know we don't need to even check it, but what's the exact solution for the table. is it okay to just cross out?

@gursharansingh5202 2 месяца назад

Can you show the truth table of Modus tollens

@dhanish2798 2 года назад

good explaination

@nikhilvaishnav8666 3 года назад

Really Helped Me.. 👌👍

@II2023II 8 месяцев назад

Hello, I have a question , how can I contact with you?

@raymanhein5920 3 года назад

Finally I found gold

@skellingtonmeteoryballoon 3 года назад

Hypothetical syllogisms are tricky. Truth tables test my patience.

@alexwest786 Год назад

you are a godsend

@adnaankazi7402 5 лет назад

No one could have done better 🔥

@StaticBlaster 5 лет назад

can someone explain to me why the third row is true for p implies q? i don't understand how he's getting true if p is false and q is true. Thanks for clearing this up.

@montronics8430 5 лет назад

Really helped me.

@uvocka 2 года назад

*so if p→q is that : if truth is truth then it's true, and if Ffalse is Ttruth then is Ttrue, and if Ttruth is Ffalse then its Ffalse*

@halofreak644 4 года назад

I could have sworn this guy was the POTUS shout out from Cali

@ruwanchamara2578 4 года назад

thank you sir

@masoluboxD 4 года назад

what if I got two premises: "A: p -> q, B: -q or -r" why does it follow that: "-p or -r" an why does it not follow that: "-r -> p" I cannot figure this out

@BrotherofWord 4 года назад

What do you mean by the "vacuously true scenarios"?!?! How are they both true?

@BrotherofWord 4 года назад

@@DrTrefor Thank you very much; it's a very helpful show you run. So is that the same as saying it is non-falsifiable? And if so, is it because there are NO unicorns? Or just because I am not a unicorn and, therefore it cannot be shown that I wouldn't be blue if I was? (sorry for the tedium)