An objection: The word necessarily changes the situation and removes the difficulty, since it is maintained that the rationally necessary is not necessarily the objectively real, and not that it simply is not the objectively real.
However, that which is not necessarily the case, or not necessarily actual, is either false or without sufficient rational grounds. If false, then the objection cancels out and is invalid, for the word necessarily may be dropped. If believed without sufficient rational grounds, then the definition may be substituted in the original statement---the rationally necessary is what is believed, without sufficient rational grounds, to actually be the case---and is therefore self-contradictory. In either case, then, the original objection fails.