I didn't say take it way.
I said you the proc to change knockdown to knockback instead knockback to knockdown.
And as you indicated if it starts with just knockdown, then even simply adding a knockback enhancement would cause knockback.
But I'm glad that you at least explained your position.
And, if you read one of my earlier post, I went into detail about how I use knockback which also works when using repel.
To go back to a post on another thread, I run into situations where people say something about knockback the most when I first start using a power where it says in the description "knocks down enemies" versus knockback enemies. Regardless of how that term was used in the past, we know there is a proc that clearly indicates "knockback to knockdown" so, at the very least, the DEV that named that proc knows the difference between "knocking back an enemy" and "knocking down an enemy". So from at least that DEVs point of view, a bunch of the powers that say "knock down an enemy" are "knocking back an enemy" instead.
Just because something has been worded some way in the past doesn't mean that it is actually saying what it means.
In the case of my example (and there are many others), the power does not "knock down an enemy", it and, others like it, knock the opponent back.
Since there are clearly powers that do simply knockdown or knock-up, I don't think it is such a stretch to think that the info you get when picking the power says clearly what it does.