If it'd benefit him to lie, then he can still lie.

[Mahiro himself is kind of okay with the Teishu but he still doesn't trust him by any means.

With that said, he can acknowledge the point about the spy probably not having anything too vital. Still.]

Even if it's not something the Sage told them intentionally, there still could be some shit they picked up on if they were having regular contact with him like that.