Mental deception is the ability to lie with one's thoughts.
- Sally Nakamura will have this ability naturally.
- An unnamed vampire in World 4 possessed this ability naturally.
- Belleze Crinamorte stole this ability from the vampire using ability absorption.
- Jesse Parkman will also have this ability naturally.
Using this ability, Sally will be able to lie convincingly in her thoughts and her mind will not contradict it or betray the falsehood. This means she could lie when communicating telepathically, and if she chose to she could present false thoughts to a telepath. There will be no way to detect when she uses this ability. Lie detection would only be triggered if she spoke the lie too. However, truth activation and truth manipulation could both be used to force her to admit the truth instead.
All that is known is that this vampire could lie in his or her thoughts, and prevent telepathy from being used to detect the lie. He or she lost the ability when it was stolen by Belleze. However, he or she would have later regained it upon Belleze's death.
Belleze used this ability to prevent Lleucu Firelock and Lewis Smith from detecting his true loyalties via their telepathy. Because of this he succeeded in joining the Firelock Coven Guard and then poisoned Tannith Firelock. The deception was only uncovered by his twin sister using postcognition.
This ability will enable Jesse to lie mentally. No one would be able to detect lies in his thoughts, and any telepath searching his mind would be instantly and completely deceived. It will not matter how extreme the lies he presents in his thoughts are. Abilities such lie detection would only be triggered if he also spoke aloud, and even then, his thoughts would appear to contradict the detection if anyone tried to read them. This would mean that any mind reader would struggle to accept that it was untrue, as the ability will also drive them to believe the lie.
- Deception is the ability to deceive lie-detecting abilities
- Stealth can be used to prevent lies from being detected by deflecting away all suspicion
- Mental shield is the ability to shield one's mind from telepathic abilities
- Mind shielding is the ability to protect others from telepathy
- Perspecuity, mindstrike and diamond aura all give mental immunity
- Identity theft can be used to present another's thoughts instead of one's own