The information was so minimal that it only leaves me with two options, especially considering he had to have drawn the conclusions about the Deemers and Zymandis when given all the information.

The first is that he only has a rudimentary amount of knowledge that wouldn't be valuable to us. That's the optimistic approach, of course, and given how many can be defensive of ALASTAIR, I'm willing to consider it, even though ignorance is just as unforgivable as deceit.

Or he deliberately left information out and left us here to solve the problem on our own to see how it plays out, and to gauge the changes in Zymandis's tactics over the last thousand years without any other variables. Just a raw exchange of power between us and them.

[aka what Urahara would've done if he wanted to test a new Zymandis' limits]