Enjolras nods slightly: yes, there's that at least, which is no proof but is still a compellingly suggestive point.

Beyond that, there's not really anything further to say. They have little real data, and no point in speculating without it. He reaches over to clasp Combeferre's free hand in silent companionship, and holds it as he listens.

And at the end --

"No," he says slowly. One can nearly see the prospect dawning in his face. "There's no reason to rule out that possibility either."