Logic Unit Notes

Who Defined the Study of Philosophy and Logic? ,[object Object],[object Object],[object Object]

Socrates b. 470 BCE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Plato b. 428 BCE ,[object Object],[object Object],[object Object],[object Object]

Aristotle b. 384 BCE ,[object Object],[object Object],[object Object],[object Object]

Aristotle Part 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is Logic? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Quick check: Stop taking notes! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],What are the unstated assumptions?

What is a syllogism? ,[object Object],[object Object],[object Object],[object Object],[object Object],If A = B and B = C, then A = C

A visual representation Fish are not mammals Not in your notes -- just think it through! all things with hair all mammals have hair mammals fish do not have hair fish

True vs. Valid Arguments ,[object Object],[object Object]

True, Valid or Both? bad drivers All old people are bad drivers. Old people Jean is an old person. Jean Jean is a bad driver. If the premises are true, the conclusion would be true. So this is a valid argument , but obviously false.

True, Valid, or Both ,[object Object],[object Object],[object Object],Scientifically, this is valid and true All fruits Tomatoes

Is this True, Valid, or Both? ,[object Object],[object Object],[object Object],Faulty logic because this syllogism assumes anything not human is immortal. However, according to some people’s beliefs, this is a true statement: So this is an invalid argument, but a true conclusion. ghosts all things immortal human beings

Is this True, Valid, or Both? ,[object Object],[object Object],[object Object],weeds flowers The conclusion here does not logically follow as a necessary consequence; therefore this argument is invalid . plants

Logic Unit Notes

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Logic Unit Notes