19 R. What then think you? Is the science of debate true, or false? A. True, beyond controversy. But Grammar too is true. R. In the same sense as the former? A. I do not see what is truer than the true. R. That assuredly which has nothing of false: in view of which a little while ago you took umbrage at those things which, be it in this way or that, unless they were false, could not be true. Or do you not know, that all those fabulous and openly false things appertain to Grammar? A. I am not ignorant of that indeed; but, as I judge, it is not through Grammar that they are false, but through it, that, whatever they may be, they are interpreted.
Since a drama is a falsehood composed for utility or delight. But Grammar is a science which is the guardian and moderatrix of articulate speech: whose profession involves the necessity of collecting even all the figments of the human tongue, which have been committed to memory and letters, not making them false, but teaching and enforcing concerning these certain principles of true interpretation. R. Very just: I care not now, whether or not these things have been well defined and distinguished by you; but this I ask, whether it is Grammar itself, or that science of debate which shows this to be so. A. I do not deny that the force and skill of definition, whereby I have now endeavored to separate these things, is to be attributed to the art of disputation.
Source: Soliloquies (New Advent)