There isn't a stick in this whole pile that won't float, and I don't quite understand why the pile won't.

But I don't doubt you're right about it, Sam.

You always are right whether I understand how things are or not." "Let me explain it to you, then.

Do you know why some things float and others don't ?" "Yes, of course.

Because the things that float are lighter than the things that sink." "Not exactly.