Scientific discovery is NOT (as is repeated here on this forum Ad nauseam ), "evidence based" scientific discovery starts as a question with no answer.
Scientists begin in the abstract, thinking about the unknown, they begin to hypostatize, to speculate ,to create imaginary "proofs" that may be only mathematical formulas that have no basis in reality. They form a hypothesis which sometimes remains unprovable for centuries.
The propensity on this site to , DEMAND "answers" and evidence based "proofs" is unscientific, it is interrogation and bullying, disguised as scientific method.
The Higgs Particle or Higgs boson was only a hypothesis an unproven theory, a set of mathimatical assumptions, nobody could "prove" for 40 years ! Think how much shouting mocking and "demanding proof" Cofty and Viviane could have done for 40 years. "where is the evidence?" "we want to see it, touch it, give us proof." There was none. Peter Higgs proposed the mathematical mechanism, a mathematical model, that suggested the existence of such a particle in 1964. This is was a theoretical discovery not able to be proven until 2013 , not matter how much anyone "demanded proof" for 40 years.