"I...guess." He's terribly confused as to why she's not angry with him at that, though. Not knowing someone's species seemed kind of rude.
But then she never seemed like the type to get upset with people, even when he tried to tell her to leave him alone after the issue with the spider bites.

Sollux sighs and rubs his head. He's still exhausted, and being thrown so off guard here has made him pretty confused and somewhat sluggish mentally.