She may have physically heard of them, but her brain may reject all but the intended message from the manipulators, as described by Aldous Huxley in his 1958 Brave New World Revisited, the whole of which is worth reading, as is his original 1932 Brave New World:

"Some animals are more resistant to stress than others. Dogs possess­ing what Pavlov called a "strong excitatory" constitution break down much more quickly than dogs of a merely "lively" (as opposed to a choleric or agitated) temperament. Similarly "weak inhibitory" dogs reach the end of their tether much sooner than do "calm imperturbable" dogs. ... What the intelligent and practical dictator needs is not a patient to be institutionalized, or a victim to be shot, but a convert who will work for the Cause. Turning once again to Pavlov, he learns that, on their way to the point of final breakdown, dogs become more than normally suggestible. New be­havior patterns can easily be installed while the dog is at or near the limit of its cerebral endurance, and these new behavior patterns seem to be ineradicable. The animal in which they have been implanted cannot be deconditioned; that which it has learned under stress will remain an integral part of its make-up. ... Furthermore, it has been found that the de­liberate induction of fear, rage or anxiety markedly heightens the dog's suggestibility. If these emotions are kept at a high pitch of intensity for a long enough time, the brain goes "on strike." When this happens, new behavior patterns may be installed with the great­est of ease." [From Chapter VII, Brainwashing]

Links below but beware, the overall site seems to be pro-eugenics and anti-Huxley:

Brave New World Revisited: https://www.huxley.net/bnw-revisited/

Brave New World: https://www.huxley.net/bnw/index.html