I've found that even if you only have one side of the conversation (yours) it's still particularly useful. Their responses still have to logically make sense with your questions, so they can't say shit from whole cloth. It's not perfect but it still helps.
Incorporate/repeat their responses in your follow up questions, still has no use in actual court and people determined to not trust you still won't trust you, but at least it'll show more complete picture to someone with an open mind
I've found that even if you only have one side of the conversation (yours) it's still particularly useful. Their responses still have to logically make sense with your questions, so they can't say shit from whole cloth. It's not perfect but it still helps.
Incorporate/repeat their responses in your follow up questions, still has no use in actual court and people determined to not trust you still won't trust you, but at least it'll show more complete picture to someone with an open mind