"Can't exist" doesn't mean "there's no way to make a valid sentence out of those words", it means "it'll sound wrong to native speakers". I remember the scient

"Can't exist" doesn't mean "there's no way to make a valid sentence out of those words", it means "it'll sound wrong to native speakers". I remember the scientific paper that included the phrase "I smoke crack rocks" in the sentence "we observed vaporized iodide (I) erosion on soil in an experiment where we saw I smoke crack rocks.