Should we shave with 'Occam's Razor'? [Illustrated] 

‘Occam’s Razor’ is one of those terms that seems to crop up a fair bit in a lot of different places. It has various applications in philosophy, science, medicine, and myriad other disciplines; but somehow is often misconstrued. So what exactly does it mean? And how ought we use it?
Here are the links to the texts used in the video:
Case Book of Sherlock Holmes (Conan Doyle) www.amazon.co.uk/Casebook-She...
Completed Dialogues (Plato) www.amazon.co.uk/Complete-Wor...
Oxford Handbook of Metaphysics
www.amazon.co.uk/Oxford-Handb...
Philosophical Writings (Ockham)
www.amazon.co.uk/Philosophica...
The Principia (Newton)
www.amazon.co.uk/Principia-Au...
Demon Haunted World (Sagan)
www.amazon.co.uk/Demon-Haunte...
Zen and the Art of Stand-up Comedy (Hoffman) www.amazon.co.uk/Stand-Up-Com...
Miles
[Music: Uniq, Art of Silence, • Art of Silence - Drama... ]