Press the right key for the next slide (or swipe left)

also ...

Press the left key to go backwards (or swipe right)

Press n to toggle whether notes are shown (no equivalent if you don't have a keyboard)

Press m or double tap to see a menu of slides

 

↔ : truth tables and rules

ABA → BB → A(A → B) ∧ (B → A)A ↔ B
​TTTTTT
​TFFTFF
​FTTFFF
​FFTTTT

​1.

A ↔ B

​2.

A

​3.B↔Elim: 1,2
​1.

A ↔ B

​2.

B

​3.A↔Elim: 1,2

How do I intro ↔?

ABA ↔ B
​TTT
​TFF
​FTF
​FFT
ABA → B
​TTT
​TFF
​FTT
​FFT
​1.

A

​2....
​3.B
​4.

B

​5....
​6.A
​7.A ↔ B
​1.

A

​2....
​3.B
​4.A → B
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