[misterbwong]

I think you're confusing real with measurable.

[Green_man]

Alternatively, how are we supposed to know it's real if it's not measurable?

[crispyambulance]

A designer's work is, in large part, sensory and thus "measurable".

It might very well be subjective and difficult to put into words, but even if one is a strict positivist, that's acceptable.