My biggest issue with the vote was that Brexit didn’t win.

48% votes to remain and 52% percent votes for 6 different and often mutually exclusive relationships. Which was proven as soon as negotiations began and why there should have been a vote on the final deal which would have certainly failed. But instead people voting for a Norway model or a Swiss model all got counted alongside the lunatics that would have physically dragged the UK further into the Atlantic to get away from Europe given the chance.

It wasn’t 48% Vs 52%, it was 48% vs 8% and 8% and 8% …

What if your compiler is compromised? https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_ReflectionsonTrustingTrust.pdf

It depends on the level of mistrust you’re willing to entertain but the short version is; no, you cannot be sure.

Ken Thompson’s 1983 talk, Reflections on trusting trust is the classic talk on just why you cannot be sure.