[MichaelDickens]

Why did Alice want to know whether Bob knew if Carol was coming, but didn't want to know if Carol was coming? That seems like a weird thing to want to know.

[wolfgke]

> Why did Alice want to know whether Bob knew if Carol was coming, but didn't want to know if Carol was coming?

Because Alice wanted to find out whether Bob and Carol know each other well enough that Bob knows whether Carol will come or not.

[goliatone]

Alice was building a social graph model of ppl attending the party?

[MR4D]

I think you missed a step (or maybe I did?)...

Alice wanted to know if BOB had built a social graph of people attending the party.

BTW, your comment was pretty funny either way.