To assert a proposition is "wrong" means it was well formed enough to falsify based on predictions and empirical evidence. Statements and propositions that cannot be falsified are NotEvenWrong.
cf. WrongerThanWrong
I believe the phrase originated with Wolfgang Pauli, who, when reading a graduate student's work, said, "Ach -- this isn't right. This isn't even wrong!"
Who ate the rest of the content? -t
I did. Pointless flame war. -J