What's the difference between being a good liar and having a vivid imagination?

Question

There's this girl I know who is a compulsive liar and she's so good at it. Every sentence that comes out of her mouth is a complete lie and nobody ever catches it. Is this because she has a good imagination or something else?

Answer 1

Intention.  If she actually believes what she's saying, I'd say she has a good imagination (i.e. she's delusional, haha.)  If she doesn't believe it, then she's just a liar.

Really not a good thing to be either way.

Answer 2

If she is never discovered to be a liar it means she has an excellent memory.