Quote:

You're not an idiot.

It depends how you define pieces or major sections of debris. There's lots of wreckage. You have the main stern section, and the main bow section; the 'third piece' is a double bottom section from the area of the break that extended the width of the ship.

Strictly speaking, though, even the 'third piece' can be debated as this section of the double bottom is (I understand) partly or wholly fractured into two.

So you could regard Titanic as in two large pieces, or more.

Best wishes,

Mark.