Heisenberg's Uncertainty Principle (1927)
The position (x) and the velocity (p) of an object cannot both be measured exactly at the same time. When we know the position of an object with high certainty (Δx is small) then we have a large uncertainty on its momentum (Δp large).
Something extremely bogus is going on. Was tested for covid four times today. Two tests came back negative, two came back positive. Same machine, same test, same nurse. Rapid antigen test from BD.