I find it funny that they try and claim that the "NO diving sign doesn't say no jumping" seeing as in order to preform a dive you have to do some sort of jumping motion thus diving is the exact same as jumping so yes the signs do mean no jumping in.
No, it doesn't. Technically the kids are correct, "no diving" does not logically imply "no jumping". Diving implies having to jump, but jumping doesn't imply going into a dive. It's a "all squares are rectangles but not all rectangles are squares" situation. If a sign said "No drawing squares allowed" it doesn't mean that you can't draw any rectangles or even polygons for that matter.
If the sign said "no jumping" THEN you would be correct in saying that it logically includes diving.

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