“This is a rather innocuous, benign query, and further evasiveness on Joe's part may be an additional indication of aberrant thought process.”
“His aberrant mind may choose what it wishes to believe, for in unreality are all things real.”
aberrative
Descriptive of an object or measurement that has deviated or been knocked, momentarily and sharply, from the more dominant, normal or expected course or trajectory to which it either has or is expected to return in the longer term.