Is it possible to promote a soldier twice in one mission?
If I take a rookie/squaddie solider on a long mission and he gets lots of kills - will he receive XP to take him up 2 levels - or am I always 'capped' to one promotion per mission?
edit: same for Psi skills - if one guy does lots of Psi skills - can he get a double promotion - or am I wasting my time?
I have never seen a double promotion (other than somebody getting a psi promotion and a regular promotion, which is quite common), despite engineering situations where a single operative gets to use Mindfray a dozen times in a mission or kill 9 thin men with a single blaster charge. It would seem that the answer is no, you can't get double promotions.