So?? How do distinguish deliberate fraud from stuff happens?

You examine the publicly available source code.


The problem is you have two votes - electronic and paper
- that do not agree. How do you know which is correct?

You don't. But you do know that the vote tally from that machine is
suspect. It should never happen.

(ok, you can stop laughing)

But it should never happen. Vote tallying is inherently simple, even if
voting theory is inherenly complex. Any beginning programmer can write
a program to tally votes (and also to mis-tally them). If the computer
can't count, then something is massively wrong.

Heading back on topic, the altimeter says 5,000 feet and the GPS 6,000.
Which is correct?

You don't know. But what you do know, which is valuable, is not to
conduct an instrument approach in IMC with this kind of discrepancy.

Jose
--
You can choose whom to befriend, but you cannot choose whom to love.
for Email, make the obvious change in the address.