basically if you start with a crazy wrong conjecture, then it can't be proven true
a conjecture is a guess based on incomplete information some examples are when you have some special cases and assume they are true for all cases
example: this rectangle is 4 by 16 this square is 8 by 8 they have the same area therfor I think that all squares have the same area as rectangles (that's obviously false) so you can't prove that true
