I need to know if this is a real or apparent argument.

A: I saw Bob with Mary last night.

B: You saw Frank, Bob's identical twin, with Marsha last night.

Also, I need to know if these statements are consistent or inconsistent.

(A and B are two different people)

A: I think Ian is at the tea house.

B: You know very well that Ian is not at the tea house.

Thanks!