[ben_w]

I'd say it's worse than that, a rubber ruler still has a definite length when not under tension etc.

This might be more like asking amateur painters to each paint a picture of a different one of the pumpkins, then judging each other's paintings without seeing the actual pumpkin that painting was based on.

[jacquesm]

Ok, that is indeed better. For a further improvement we should let the previous generation of paintings judge the new one.