I accept your argument but how am I to know what is, is? How it came it be? and what it means?
I believe mlo’s point in following this line of thinking was to establish a baseline with whomever it was he started the conversion.
If you can agree that something can be true and actual outside of and apart from your validation of it, then the conversation can continue. If you don’t believe that, then there is nothing to build upon.
At least that’s my understand of where mlo was going with this.