This discussion may contain spoilers!
Was wondering - what happens if you say nothing at all (ie. don't select any voice options) at dinner?
After you find Mark without his legs, that is. I watched a few playthroughs but most of them select an option at one point or another.
And how does letting Clementine eating human meat affect future dialogue?
I'd test it out myself, but I don't have the time to invest in a momentarily-cannibal-Clementine playthrough.