What's also worth noting is that they were not alone in the room, talking privately. Everything being said could presumably be heard by Back's business associates as well. Some of the questions could well be enough to cause embarrassment or unease on that account.

It did make me think - if he seems nervous under this questioning, it could be because he's actually Satoshi. Or it could also be because he's thinking something like, oh god, if this jerkoff convinces a bunch of people I'm actually Satoshi, all of the businesses I've worked so hard to found will collapse, I might be convicted of crimes around lying about it while founding these businesses, I might get targeted by any number of criminal gangs or even nation-states who will do all kinds of torture to me and my loved ones and will never believe that I'm not actually Satoshi and don't really have a secret stash of a bazillion Bitcoins.

Naturally, this journalist doesn't seem to care much about any of that, or that it wouldn't really change anything at this point besides making the life of whoever it actually is hell.

Yea pretty similar idea to a polygraph test which for years was called a "lie detector."

In reality, they measure a bunch of things that may indicate lying, but they are just as likely to indicate that a person is nervous or reacting to the fact they're being tested at all.

They're typically inadmissible in court these days, however, there is still a pretty solid amount of blind trust in their results.

That part of the article gives a similar "lie detecting" hypothesis, just without the machine.

In fact, we are incredibly bad at telling lies from the body language of people we don't know well. Pretty much all the "well known" tells are sheer and utter bullshit that at best tells you if a person is stressed. That may or may not mean they are lying, but unless you know that person well enough to know if they have specific tells that correlates with lying for them, your odds are poor.

Just a shot in the dark but any chance you grew up in an intensely religious household?

I grew up evangelical and I've noticed this tendency in myself, and saw the connection to how the authorities at my school or church basically demanded dishonest performances or apologies under threat of physical punishment. Several friends over the years have said roughly the same, so I have an armchair theory this is pretty prevalent for that sort of childhood.