A magic-user's ability to use sigils is due to an advanced genetic modification at birth - a mutation that has the unfortunate side effect of total blindness.
Maybe you just used it for clarification, though my fear is that in equal parts it stops new ideas from occuring.
Also, I think deciding on what each stat does will happen in later posts, not a clarification.
(A clarification would -in my mind- happen after a rule is made, though worded possibly ambiguously.)
|The number of credits starting characters have is equal to 150 + [(Influence+Creativity+2)x(Inluence+Aptitude)] + (50xLevel).|