The word 'illusion' should be removed from every dictionary. It's one completely unspecific, indeterminate and misleading word and most subjects or patterns of discourse in which it appears have the same properties. The title of this post also reminds me of https://en.wikipedia.org/wiki/E-Prime Just searching for "* is an illusion" returns - consciousness - choice - spacetime - the world - physical reality - certaint…
I don't understand what the title has to do with avoiding forms of "to be"? It contains the word "is".