And

And(Condition1, Condition2 [,Condition3 …])

&&

Returns true if all arguments are true.

And(TRUE, TRUE): True

And(TRUE, FALSE): False

And(FALSE, FALSE): False

And(TRUE, TRUE, TRUE): True

Or

Or(Condition1, Condition2 [,Condition3 …])

||

Returns true if any of the arguments are true.

Or(TRUE, TRUE): True

Or(TRUE, FALSE): True

Or(FALSE, FALSE): False

Not

Not(Condition)

!

Returns true if its arguments is false, and returns false if its argument is true.

Not(TRUE): False

Not(FALSE): True