He is already back where I am from. [He considers Grayson's words, unsure of where they're coming from. Batman-Father-has already accepted he and Grayson as Batman and Robin. He isn't afraid of that. (He is maybe afraid that Grayson will eventually return to Nightwing and he doesn't know if Father will accept him as Robin then, but that is not relevant here and now.)
But with so many pieces, he can't expect Grayson to come to the correct conclusion.]
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But with so many pieces, he can't expect Grayson to come to the correct conclusion.]
I know. [That's not it. He can't say what it is.]