“You were at Duffy’s bar on the night of July 15, weren’t you?”

No, I definitely was not.  Even if Duffy’s bar actually existed and I was in attendance, I’d be tempted to lie about it.

Why?

Leading questions irritate me to no end.

Even though I am the worst liar in the world, I would rather lie than follow a predetermined path of a conversation.

You don’t ask leading questions, do you?