[tern]

There is no such "design theory," only schools of design

[crazygringo]

There are basic principles of design -- of balance, emphasis, color, weight, etc. -- that are very much part of a general "design theory". That aren't dependent on any particular school of thought.

[jrowen]

I feel like this is actually quite a bold claim. Just within this thread there is wild disagreement. The term “design” is so insanely broad. There are Dieter Rams-style principles of functional objects that have sort of “won out”, but with graphical design, it’s essentially art, it’s all so subjective.

[adastra22]

I wish this was better understood.