- "The Mind scanner, while occasionally fatal, is the only sure test."
The Mind Scanner is presumably a Terran made device for the purpose of proving the validity of a subject's answers. The scanner it self is large and bulky. A large computer station affixed to a restraining chair comprises the main part of it.
The subject is locked into the chair and then a bar is lowered over his chest and then a helmet over his head. When the scanner is activated, it scans the subject's mind and then generates a holographic representation of the subject's thoughts. The process is painful and utterly impossible to hide anything from. However, a mind scanner can not be used on a Neosapien due to differences in the brain. A fact Marsala no doubt had in mind when he pretended to betray Able Squad on Mars.