Adjectives in this construction

TicceCould you explain this sentence. What does this sentence mean - She is stupid to ask.
1) It is stupid of her to ask. - She should know the answer, so is considered stupid for asking.
2) It is stupid to ask her. - She won't know so why ask her.

Compare
He is hard to

Dave, I think s/he wants to know the meaning of this sentence.

She's stupid to ask.

Tom

Thank you Dave for paying attention to my question. It would be great if you could explain why

He is hard to please. = It is hard to please him.

He is difficult to understand. = It is difficult to undersatnd him.

He is easy to notice. = It is easy to notice him.

He is pleasant to work with. - It is pleasant to work with him.

But

She is stupi

Tom if you don't know a gender you can always use a name otherwise you treat me as "it"

TicceTom if you don't know a gender you can always use a name otherwise you treat me as "it"

Ticce, Tom was being polite when he said s/he. That is how address a unknown gender in the 3rd person. It would have been very rude. You are right using a name is better but Tom won't see your name when replying to me. We answer so many posts remembering every

Sorry I couldn't edit my last post. You use of rather than for.

As I said we read so many posts they can get confused.