I cannot tell a lie, but I can detect one

[novapsyche]

How We Recognize What Is True And What Is False

Deciding whether a statement is true involves memory; determining one is false relies on reasoning and problem-solving processes.

[...] False statements differentially activated the right fronto-polar cortex in areas that have been previously related to reasoning tasks. The activations related to true statements involved the left inferior parietal cortex and the caudate nucleus bilaterally. The former activation may be hypothesized to reflect continued thematic semantic analysis and a more extended memory search. The caudate activation may also reflect this search and matching processes as well as the fact that recognizing a sentence as true is in itself a positive reward for the subject, as this area is also involved in processing reward-related information.