Did I tell you I think my father is a child molester?
That's a serious charge. What makes you think that.
I don't know, the thought just comes to my mind.
Oh no.  It is indefensible for a parent to molest a child.
It's just a thought, I don't really know if he did it or not.
Before making those kinds of accusations, you better be sure you know what you're talking about. Spreading unsubstantiated rumors like that is destructive and slanderous.