The point Canito is trying to make is that there is an inherent rationale and paradox of the meaning behind heartLESS and NObodies.
My guess, assuming the pattern is followed, is that the broken down meaning of the word UNbirth will be seemingly paradoxical to the way in which unbirths are created/what unbirths are made of.
But just like it is with Heartless and Nobodies, the meaning of the actual word and what actually composes unbirths will make sense in an ironic sort of way.
you supporting me? then, yeah what he/she said!
Again, It's can for shorts
Yeah, about that, if ''sleep makes way to hidden fate'' then they were something who had fate, died, and became unbirths... hmm let's see.. lots of them in bbs..... no body/hearts...... have fate... keyblade... I mean!....to receive sleep.