Of course it can be both. The question the author is asking, given the above, is...

zzalpha on Sept 25, 2016 | parent | context | favorite | on: Am I Introverted, or Just Rude?

Of course it can be both.

The question the author is asking, given the above, is: where is the line between introversion and just being selfish? And does she cross it and then justify her selfishness as introversion?

lerax on Sept 25, 2016 [–]

Exactly. Good catch.