Complex sentence: While still alive, Alexandre mysteriously exists in two separate mental states simultaneously: a vegetative trance-like state and a normal functioning state, suggesting that he had long since crossed the Veil.
Split into simpler sentences: While still alive, Alexandre mysteriously exists in two separate states simultaneously. He is implied to be both in a vegetative trance-like state and a normal functioning state, implying that he had long since crossed the Veil.