[... well, he supposes that is true, but it is still rather odd.

...]

I don't see why they would believe we are the only group here. [if they were transported in but somewhere else, other groups beforehand could have been as well. Basically, he thinks that's jumping to conclusions....

... but okay, he can at least know that that grin means.]

If it will not be a waste of time-- [if you have ulterior motives] --then I suppose it could not hurt.