Ok, think I got it, the confusion is how we define "purple". Yes, if we define it as "magenta" = mixture of red and blue, then it is pretty obvious that it wou

Ok, think I got it, the confusion is how we define "purple". Yes, if we define it as "magenta" = mixture of red and blue, then it is pretty obvious that it would be closer to red than green and, of course, the left hump is insignificant. However, in the TFA, it is defined as "purple is at the opposite end of the spectrum from red" (which is technically "violet" indeed), and in that case purple being close to red (by being perceived same as magenta) can only be explained by "red hump" = red-sensitive (L) cones being also sensitive to blue. Does not look you disagree with that.