Me to Numb Nuts: Give me your address so I can send you X.
Numb Nuts to Me: *nothing*
Me to Soloist: Give me numb nuts' address so I can send him X.
Soloist to Me: Here's the address. He wants Y instead of X now, but I told him Y isn't possible. Is that correct?
Me to Soloist: That's true, Y isn't possible.
Numb Nuts to Me: Soloist said Y was possible.
Me to Numb Nuts: Y isn't possible. Give me your address so I can send you X.
Numb Nuts to Me: *nothing*