Question:

K98
AQ10
KQJ109
109

You open 1NT. Partner invites game with 2NT. Do you accept?

Answer:

Yes! While you only have 15 HCP, in the words of Marty Bergen, "Points Schmoints." You have lots of 10s and 9s, and your diamond suit is worth at least an extra point. You'd rather hold this hand than a 17-count like: 

KQ
KJ65
KQ43
QJ2