Completely incorrect. Sure some might not have given proof, but you aren't the only one who has presented it.
That statement has nothing to do with whether or not if I was the only one that presented it. It has to do with another thread and how some ppl say things are true without sufficient backup to their argument. You say in this sentence that some may not have given proof, then that would be considered correct because it was talking about presenting something to back up one's claim.