Full Idea
We can never measure these virtual (transitory) particles directly, and it turns out that they don't even have to obey the laws of physics.
Gist of Idea
Virtual particles can't be measured, and can ignore the laws of physics
Source
Gavin Hesketh (The Particle Zoo [2016], 05)
Book Reference
Hesketh,Gavin: 'The Particle Zoo' [Quercus 2016], p.108
A Reaction
These seems to be the real significance of the Uncertainty Principle. Such particles 'borrow' huge amounts of energy for very short times.