We hear often from our adversaries on the Left that race, sex, nation, and so forth are all merely adventitious social constructs, and so presumably, as fundamentally adventitious, therefore nowise suasive or authoritative, but rather, only, and simply, and completely, specious.
But the notion of the social construct redounds to and devours itself. It is autophagous. It cannot therefore be true.
If reality is socially constructed, and if that social construction is by itself a legitimate generator of truth, then one of the social constructs that can be legitimately constructed, and therefore treated as true, is the social construct that reality is not socially constructed. If on the other hand reality is socially constructed, but that social construction is not a legitimate generator of truth, then one of the social constructs that cannot be legitimately constructed, or therefore treated as true, is the social construct that reality is socially constructed.
Finally, if reality is not socially constructed to begin with, then the notion that reality is socially constructed is simply false.
All our notions are affected by society, to be sure. But that does not mean, as the Social Justice Warriors would like it to, that they are all just made up for no good reason, so that we can modify them as we wish and without serious consequence; that they are not, in other words, simply true, more or less.
To think that our social constructs are adventitious is to suppose that we are a society composed mostly of inveterate liars or fools. But if that were so, how could we have managed to survive thus far?