"Not a... grid...?" Vincent repeats them, with more confusion than before.

"Seriously, is there an echo in here?" Robin, meanwhile, smiles and pretends that something is stuck in his ear. It's a short bit, but his good mood does not waver as he asks more eloquently for clarification: "If yours wasn't a grid, Phalanx, what was it?"

He thinks he knows the answer--but earlier, he thought he knew a lot of things about Phalanx that quickly turned out to not be entirely true. He sees no harm in asking, aside from potentially giving Vincent a headache.