Is there a word for the ability to see through deception? [closed]
The Cambridge dictionary defines Perceptive as;
Very good at noticing and understanding things that many people do not notice.
It's a more generic term than you might be looking for, but it does fit the case you have outlined.
For the general ability of being able to evaluate someone (their mannerisms, intentions), I would go with the word "discerning" as adjective, or "discernment" as noun.
adj.
Exhibiting keen insight and good judgment; perceptive.
American Heritage Dictionaryadj
having or showing good taste or judgment; discriminating
Collins English Dictionaryadjective
Having or showing good judgement.
Oxford Living Dictionariesn.
1. The act or process of exhibiting keen insight and good judgment.
2. Keenness of insight and judgment.
American Heritage Dictionaryn
keen perception or judgment
Collins English Dictionary
Experts advise paying close attention to hard-to-hide micro-expressions; these clues are often so difficult to detect that even trained experts have trouble discerning them.
7 Clues Anyone Can Use to Spot a Liar - Readers Digest
Perhaps most surprisingly though, we are generally less interested than we think in actually discerning the truth.
How’s your poker face? Why it’s so hard to sniff out a liar
Perspicaciousness
perspicaciously adverb
perspicaciousness noun
perspicacity noun[perspicacious]: of acute mental vision or discernment
SHREWD, SAGACIOUS, PERSPICACIOUS, ASTUTE mean acute in perception and sound in judgment. SHREWD stresses practical, hardheaded cleverness and judgment. a shrewd judge of character SAGACIOUS suggests wisdom, penetration, and farsightedness. sagacious investors got in on the ground floor PERSPICACIOUS implies unusual power to see through and understand what is puzzling or hidden. a perspicacious counselor saw through the child's facade ASTUTE suggests shrewdness, perspicacity, and diplomatic skill. an astute player of party politics
"Perspicacious." Merriam-Webster.com. Merriam-Webster, n.d. Web. 23 Sept. 2018.