Are you a good liar?

“Bold faced lie!” exclaimed my daughter, Cassidy, during a game of One Night Ultimate Werewolf.

Lying is a feature of the game, where player identities are secret and clues are gathered before an execution.

Townsfolk struggle to identify and execute at least one werewolf. If not, the werewolves win.

Cassidy and her friends are pathetic liars. Giggling is a common “tell.” And it’s a struggle for them to come up with a lie that fits with known facts.

Their ability to identify a lie is also poor, even with the “tells.” So when a lie directly contradicts a known fact, they excitedly pounce on it.

I love that my children, and their friends, are pathetic liars. They’re clearly not practised. Though I’d appreciate a touch more of a skill at identifying the lies of others!.

How do judges do it? How does a judge figure out who is telling the truth and who is lying?

Do judges benefit from some divine insight into the hearts and minds of the witnesses appearing before them? 

Is there special training in identifying the “tells” of those not being entirely truthful? 

Will a more practised liar’s story carry the day and lead to injustice? 

A decision of British Columbia’s highest court (the British Columbia Court of Appeal) from more than half a century ago sheds light on those questions.

Unless you are a practised liar, you will appreciate the comments of Mr. Justice O’Halloran, in Faryna v. Chorny [1952] 2 D.L.R. 354 (B.C.C.A.), who identifies the problem of assessing

…the testimony of quick-witted, experienced and confident witnesses, and of those shrewd persons adept in the half-lie and of long and successful experience in combining skillful exaggeration with partial suppression of the truth.”

Mr. Justice O’Halloran goes on to identify an even more difficult puzzle, i.e. identifying when a witness has the honest intention to give accurate testimony, but is mistaken. No “tell” there! 

He put it as follows:

“Again a witness may testify what he sincerely believes to be true, but he may be quite honestly mistaken. For a trial judge to say ‘I believe him because I judge him to be telling the truth,’ is to come to a conclusion on consideration of only half the problem.”

The judge specifically noted a lack of divine insight into the hearts and minds of witnesses.  

The solution, when faced with both skillful liars and those mistakenly believing they are telling the truth? 

Mr. Justice O’Halloran said that you compare the witness’s version of events against what’s likely to be true in the context of other known facts.

In his much more eloquent words:

In short, the real test of the truth of the story of a witness in such a case must be its harmony with the preponderance of the probabilities which a practical and informed person would readily recognize as reasonable in that place and in those conditions.”

It’s not about how good a liar you are. It’s about how well your story fits with what’s most likely to be true.

But if that was the only test applied by judges, all you would have to do is weave the best fitting story.

A much more recent judgment offers a number of additional factors that trial judges rely on to get to the truth.

I will share those factors in my next column.

This article is written by or on behalf of an outsourced columnist and does not necessarily reflect the views of Castanet.