"Good, then working with you is still a way forward." He purposely phrases that in a way that - Eren hopes - will make his point as clear as possible. The moment helping Cairbre stops feeling like he's moving forward, he's choosing new direction to head in that does. The Chariot is all about progress and movement, right? So hopefully putting it like that makes him perfectly understood.

He takes another can from the cooler, taking a long drink from it to buy himself a little time to think. He can't think of any more questions, though. At least not that he thinks the Arcana would be able and willing to answer. So instead he'll ask about what happens if he thinks of something else later.

"If I have more questions and try to get your attention, will you answer me again?"