[joeysteele]

If Dexter really has such difficulty remembering the 'exact' words that others have said maybe he would do better not to attempt to say what someone has said to others and present it as gospel when he himself talks to those other people.

He remembers alright,he just twists it to suit his own agenda as to what he would have liked them to say.

Whatever happened to Dexter's stammer by the way that was mentioned early in the series as to how he found it hard to explain things.
He does perfectly well saying anything when he is lying or twisting things.