[d2j]

That's like saying "this study of people saying they like the red colour is worthless because they haven't defined what the red colour is"

PC has one definition, but of course you can make up others

[andybak]

> PC has one definition

And definitions are never complex, multifaceted or problematic, eh? Thank goodness language is so simple and clear.

[pjc50]

Color doesn't even have unambiguous definitions. The XKCD color survey was a fun inquiry into this: https://blog.xkcd.com/2010/05/03/color-survey-results/