I have Fridayitis at the office so I thought I'd pick your brains on a fun conditional I can't seem to wrap my head around right now (which also might have something to do with the whole Friday thing).
Arguments/Rules (not from any particular PT): If "x", then "y", except when there is "z", in which case there is never "y".
X -> Y
X -> Y ->
Clarification: The given rules preclude the existence of X and Z together to yield Y, correct? In other words, "X or Z, never both"? The exception wording is a bit untidy.
Much appreciated. Enjoy the weekend.