[lores]

Same problem as rating your pain on the pain scale: is 10 the worst pain I've experienced, or the worst I can imagine? Because I've got a... very vivid imagination. And still, that's the best we can do. I blame an imperfect universe.

[rightbyte]

No it is not the best we can do. Like, just ask "are you happy?" instead of some convoluted scale.

Like, if there is no consensus on what the scale means the answers will be too culturaly dependend and random between individuals.

In my experience doing surveys "was the food good?" after say a conference is way easiee to interpret than some scale answers.