confabulator

One might argue that technology has made it harder to deceive people given that we’re all but a Google away, but technology has also made the natural human temptation to self-flatter, to metaphorically Photoshop ourselves into or out of existence all the more tempting for the chronic exaggerator, the serial confabulator, the natural overcompensator.

A confabulator is a person who fabricates imaginary experiences as compensation for loss of memory.

She called him a "confabulator" and urged people to "look up" the word.

Less euphemistically, you could call the left-brain interpreter a part- time confabulator.

He can be an amusing and sympathetic guide in this packaged tour de force, but readers who want true literary adventure should turn back to that great confabulator, Charles Kinbote, the deranged scholar-poet of Vladimir Nabokov's Pale Fire.