You know, I haven't read his book yet, mainly because I've always gotten a bad vibe from Levin in general - considering that logical consistency is obviously not on tap in his latest work, I see no reason to question my gut feeling.
I think your gut feeling is correct. To put it mildly, and without sidetracking this thread into a review of his book: Mr. Levin has not succeeded in impressing me with his legal acumen in general, and logical rigor is not exactly on display in MIB.