The positive claim requires evidence to support the claim.Isn't there a saying about absence of evidence? The truth value of a proposition exists whether one has discovered evidence or not. So I'm a bit surprised that you'd say something that without evidence something isn't true. Or maybe you might have used clearer wording.
In matters of subjectivity/opinion, "truth" can only be known with sufficient evidence to demonstrate that truth explicitly. Matters of objective truth might possibly be known implicitly.
Thus far, I've seen a lot of assertions regarding what "most people" do, or prefer, and precious little attempt even to provide a modicum of actual evidence to support the assertions.