[laserlight]

Thanks for the pointer. It seems that there is no such thing as a meter except the “meter as defined”. And when people discovered that measuring length is not as reliable as they wanted, they didn't say it “can not AND should not be measured”. Instead, they found better ways of measuring it.

If happiness is not as well defined or well-behaved as we would like it to be, perhaps we can make it better rather than dismissing the problem.