Visual meaning of 'iff'? - learn with images, example in daily life

Visual illustration of iff: If and only if; used to show that the truth values of two statements are the same.

conjunction

If and only if; used to show that the truth values of two statements are the same.

"You can graduate iff you pass all your classes. "

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Visual illustration of iff: Logically equivalent to rephrases:

conjunction

Logically equivalent to rephrases:

"A rectangle is a square iff all four of its sides have the same length."

Visual illustration of iff: Obsolete spelling of if.

conjunction

Obsolete spelling of if.

""Iff you finish your homework, you can watch TV." "

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