When a wafer thin disc of crystal sapphire, coated with a ceramic material, is cooled to a temperature of 185° Celsius below zero (or minus 301° Fahrenheit), it is able to glide over a magnetic field or track, giving rise to a phenomenon called Quantum Trapping.
As with Pi, this is a concept completely over my head, but that’s not going to stop me linking to this sort of stuff.
The team discovered that when magnets were applied to either the right or left side of the dorsolateral prefrontal cortex in the front of the brain, depending on which side was stimulated, the subjects would either lie or tell the truth. But when magnetic interference was directed at the parietal lobe, their decision-making remained unchanged.
If you’ve been caught out for being less than truthful you could try blaming the deception on, say, nearby fridge magnets… you never know it might work.