@JLNobody,
Always the diplomat!
Frank's earlier dogmatism about the "reality" of the heliocentric model is evidence that he has no concept of what you (and I) imply when we use the word "reality"in its
experiential sense. This is underscored by his occasional "parting company" with you on the basis of "your blind guesses".
In my reading of Derrida there is a piece about the significance of "a signature" which he argues comes from an institutionalised social convention. Here the text is illustrated by a photo of the British PM, Chamberlain returning from his 1938 meeting with Hitler triumphantly waving a piece of paper with Hitler's signature on it and his own. I suggest the piece of paper resulting from the "REALITY IS... conference "has approximately the same status.