If there are perfectly general statements that are true, they must be necessarily true, for only a necessarily true statement can be true in all possible worlds, so as to be perfectly general. Bearing in mind that ideas can’t have themselves, and cannot be true in the absence of any domain of reality to which they might appertain, so as to be true thereof, there must be at least one actual necessary being in virtue of whose knowledge of their truth such truths might be true necessarily.
The only question then is whether there are perfectly general statements that are true. “There are no true and perfectly general statements” is a perfectly general statement. If it is true, it is false. So it is false in all possible worlds. So there are perfectly general statements that are true, ergo etc.