Finally, Dick makes his Matrix point, and makes it very clearly: “we are living in a computer-programmed reality, and the only clue we have to it is when some variable is changed, and some alteration in our reality occurs.” These alterations feel just like déjà vu, says Dick, a sensation that proves that “a variable has been changed” (by whom—note the passive voice—he does not say) and “an alternative world branched off.”