Though Tsukasa blinks for a second, he accepts the statement the very next. Senku has won him over to the Kingdom of Science, the save the whole world and every last person in it point of view. Yet worlds contain terrible people, people who will not ever choose to become better, people who continually hurt others until they are stopped. He nods.

"Why do you have to wait?" Tsukasa asks. If murder is planned, why not immediately? "The Anchor... is that tied to the Inquisition? Are you waiting for them to succeed?" Perhaps these questions aren't the most important. It's okay if they aren't answered.

A soft exhale. "I'm sorry you couldn't save them," Tsukasa says. For all he doesn't understand everything, he accepts that. He cannot judge the best most moral choice Cole could have made. The feeling is easily understood.