So, I am a moderator on a forum dedicated to scientific exploration, the specifics of which I will not get in to.
The main point of this forum is to correct other's incorrect assumptions and ideas about this particular science.
However, when I make changes to someone's post and explain why, I inevitably start sounding like a douchebag. Such as, 'blank is incorrect, here's why:'. This sounds very harsh.
How do I phrase changes to make them sound less rude?