[Grammar] Come up with vs Think of

[shimacatu_sa]

Hi,
Are there any differences in nuance between the two sentences below?
If so, could you give me any guidance on how to choose the right one?

The situation, which I made up, is someone asks me if I have any ideas for a party.

A. I cannot come up with any good ideas.
B. I cannot think of any good ideas.

Thank you.

 

[bhaisahab]

They mean the same.

 

[emsr2d2]

Note that if you say "I can't come up with any good ideas", the other person might (sarcastically) ask you if you've come up with some bad ideas. Generally, when someone says "Have you got any ideas for ...?", they're implicitly asking you for good ideas.
A perfectly good response would be "I can't come up with/think of any/anything".

 

[Raymott]

The only difference I can see is that "to come up with an idea" implies that you share it with others. To think of an idea doesn't require this. But that's splitting a fine hair.