I agree completely with that Mathis.
No, 12 note tuning does not presume equal temperament at all. There are many systems of 12 note tuning that are not equal temperament - for example Vallotti, etc. - and some of them are actually more "beautiful" (if I may use such an emotional word) in specific intervals, yet lead to tuning clashes especially in an orchestral context. Equal is somewhat like a smoothed out compromise that is generally o.k. though not as "spicy" sounding as others.
No, 12 note tuning does not presume equal temperament at all. There are many systems of 12 note tuning that are not equal temperament - for example Vallotti, etc. - and some of them are actually more "beautiful" (if I may use such an emotional word) in specific intervals, yet lead to tuning clashes especially in an orchestral context. Equal is somewhat like a smoothed out compromise that is generally o.k. though not as "spicy" sounding as others.