Hmm... In my world, that same speech Ghetsis gave in this city-- Striaton-- was given in Accumula Town. After that, I believe the next course of action they took was in Nacrene City. [But he truly doesn't know what exactly they were doing there, and he's completely in the dark about the Dreamyard incident. He frowns to himself; it's shaming, how little he really knew about Team Plasma's actions, when he considered himself a leader of it.

He looks away again for a moment, thinking.] ... I think you could try. He's closed-minded, conditioned so far that he's blind to the truth. So perhaps he won't listen, but... there is a chance. After all, in my world, it was just a single trainer that gave him doubt in his own convictions.