By a word-spell - below, cult-leader Khuno thinks that he's made Darwin's "male ornaments" (traits which drive evolution in sexually reproducing species) blast-out of the portal of reality into non-being - as "metaphors"!
The physics term "quark" was introduced by Murray Gell-Mann. Initially - to him, it was the sound made by ducks! Quarks, however, lack the where-with-all to be calls emitted by ducks. Since quarks cannot be: "The characteristic sound uttered by ducks.", then extending Khuno's noxious rule from biology that "nuptial gifts" cannot exist because scorpionflies do not hold "marriage ceremonies or wedding showers" to physics, our friend the quark leaves reality - too.
The application of Khuno's Rule to physics makes much of particle physics cease to be physics. The Standard Model of particle physics goes wobbly, and the theory of Quantum Chromodynamics is over-thrown!
Under Khuno's science-term banishment-diktat, a referential contradiction will be produced - when Murray Gell-Mann is ordered to say, while pointing in the direction of a quark:
Gell-Mann: "That quark does not exist!"
However, Khuno has as much jurisdiction over what the terminology of physics and biology is - as I have over what foods the peoples of the Yucatan eat. Evidence is required to demonstrate that sexual selection (involving preferences for ornaments displayed by members of the opposite sex) does not occur in the scorpionfly species, P. cognata. This evidence would refute the theory of sexual selection (and hence evolution). Evidence is, also, required to show that quarks do not exist in our universe. According to physics - if quarks were not sub-atomic constituents, then the atoms in your body (therefore your body) would not exist.
How the world is arranged - not the re-casting of science-terms into semantic voo-doo ultimately matters in science. From Darwin's experiment forward, preferences for "male ornaments" (one of which is the "nuptial gift") have been shown to trigger non-random, differential reproductive outcomes in sexually reproducing species. If - as Khuno insists - that "nuptial gifts" are unreal "metaphors" and "false", then one logical recourse for him is Creationism to help explain what exists in nature.
Many of the quacks emitted by male ducks are examples of Darwin's "male ornaments". Female ducks show mate preferences for specific, male quack-frequencies. It has been hypothesized by another evolutionist devil, Sir Julien Huxley, that the mate preferences of female ducks are so precisely calibrated in sub-populations (clines) of duck populations, that even a Hertz or 2 poorer in "female discimination" for the male quacks, the number of duck species would be less than observed. Sexual selection is known to drive species-diversity in non-human populations. However - according the garbage-heads crudding-up this dump, evolution, sexual selection, species-diversity, nature, reality, etc. are but products of sheer lunacy.