Who claimed they were identical or interchangeable?
“Fit together perfectly” does not mean they are redundant, but rather more like complementary.
I tried to explain to the poster in #253 that commanding and “dids” are not different things, that the act of commanding is something someone does and that the other things Jesus “did” that were too numerous to be included in scripture includes things He commanded that were to be passed on.
To reach the conclusion that was reached, the subject had to be interchangeable and they weren't. Therefore the logic of the argument failed. You can not say that all things Jesus commanded to be taught are so much that even the world itself could not contain the books that should be written, as the argument went unless the subjects were interchangeable.