Could vs might(for the future possibility)
I could go there.
I might go there.
I know that these two sentences talk about less possibility to go there.
but, I can’t know their slight difference.
When you want to tell future possibilities, how do you determine to use could or might?
Here is an example sentence.
He asked me last night if you could/might be willing to talk to Margaret for him.
I saw this sentence other website. On the website, writer explained that 'could' could mean internal possibility and 'might' could mean external possibility.
Internal possibility indicates whether the person is shy, not fluent, or which is related to his ability. External possibility indicates whether there are some obstacles like that the person has no time to meet Margaret.
How do you think about that?