This must be held in mind or you may imagine that your only opponent is another open mind. I fear that opponent of truth is sometimes what you should suspect him to be anyway, a liar. DO have referential significance. Their designative meanings consist in their reference to such objects, whether or not any instances of them can be perceived as to be existing in reality. The Reductionalist fallacy.
Reductionism consists in reducing referential significance to the one mode of significance.
That is an attempt to suppose one can limit significance of words only to what exists corporeally. It is the fallacy implicit in Bertrand Russell s Theory of Descriptions. It is the machinery of NewSpeak. There is also a deeper error which is the fallacy of confusing apprehension and judgment in the processes of understanding. He said that we cannot name something without also asserting that what we named really exists.