引用:
原帖由 chefung 於 2009-7-16 03:45 PM 發表
If A, then B ( if part)
If B, then A ( only if part )
If above 2 lines is valid, then we can say, A iff B ( If and only if )
only if doesn't mean nested if LOL
ohhhhhhh.... LOL. i totally forgot the definition of iff
if hottie, then ff scores...
if ff scores, then it must be hottie....
obviously...... both line of argument fails............