629.You take with the bishop in fools mate
5,000 Signs You Don't Know Enough About Chess
634. You think a sack is something to carry somethings
635. You think a fork is a utensil
636. You think a X-ray is to look at bones
637. you think that kings is the strongest peice in chess
638. you think that pawns can only promote into bishops
639. you think pawns are to weak to give checks

A pawn can be both passed and isolated at the same time. It can't be both isolated and backwards, though.
Aren't all isolated pawns backward pawns? An isolated pawn is a pawn without pawns on the ranks directly adjacent to it. A backwards pawn is a pawn that cannot be defended by another pawn without it (first pawn, backward) advancing or another pawn capturing to get beside it.
Or am I mistaken in some way?
Maybe. I think backward pawns are connect to another pawn, though. Wikipedia gives this: "In chess, a backward pawn is a pawn that is behind the pawns of the same color on the adjacent files and that cannot be advanced without loss of material, usually the backward pawn itself."

You yell "touchdown!" and add six points to your scoresheet when you reach the 8th rank with your pawn.

623. Immediately after you castle, you realise that it makes your king harder to defend and "un-castle" on your next move to return the king and rook to their original positions.
624. You think double-check is when you are in check but before responding you put your opponent in check so that he must respond first (can continue to triple-check, quadruple-check, etc.).
625. You don't know what Los Alamos is.
626. You think the king is unable to capture pieces.
I already said 626!

We really should stop with the Fool's Mate! There have been several posts with the Fool's Mate!
627. You think white has an easy win because he's up three points.
628. You think the bishop is worth more than the h-pawn.