...you don't know anything about fishing.

If you're idea of fishing always includes a bobber...then you don't know anything about fishing.

If your primary rod is a color other than black or grey...then you (most likely) don't know anything about fishing.

If the dominant feature of your reel is a large button...then you don't know anything about fishing.

If you don't own a boat (a canoe counts)...then you don't know anything about fishing.  (Trout fishermen excepted.)

 If your boat says "fish n ski," or similar, on it, then you don't know anything about fishing.

If you don't own more than a half dozen Rapalas...then you don't know anything about fishing.

If you only know how to find fish near weeds...then you know very little about fishing.

If you only know one type of knot...then you don't know anything about fishing.

If your big fish story is about a 20" pike...you don't know anything about fishing.

If you don't know the difference between freshwater and saltwater hooks...then you don't know anything about fishing.

(I do mean this as helpful comments to point out where you should learn more, rather than just criticism.)