Good grief man, it wasn’t on the coin, you tell me it was a mistake, because they said it was. Sure I trust them. You really thin engravers don't put exactly what they are told to put on the coins? Do you really think the dies are not checked numerous times? Why do you think they were moved in the first place? Do you really think there was not room on the coin face, when every coin created in my lifetime had the words clearly on the face of the coin?
I call B$ and you have zero proof that they did not leave them off intentionally, I have proof that they did leave them off, you only have their oops statement.
Huh?
You’d have to prove that the motto was not initially part of the coin including the legislation, even and especially at the design stage, drawings, wax models, etc. Pretty tall order. Hey, knock yourself out.