Until someone comes out with undeniably solid evidence that someone cheated, the only conclusion to be drawn is that no cheating occurred. For instance, let us examine a hypothetical situation involving two competitors in a race...
Several people run a footrace, and only one of them crosses the finish line first. When the second-place runner accuses the first-place runner of cheating, the onus is on the second-place runner to prove that the cheating occurred, because the default conclusion is that the person who crosses the finish line first is the winner of the race.
The second-place runner then approaches his favorite race officials and demands that they find a way to declare the second-place runner as the winner. The officials, being ethical people of high moral standing, dismiss the second-place runner's demands and uphold the default conclusion that the person who crosses the finish line first is the winner of the race.
The second-place runner then files lawsuit after lawsuit claiming that his victory was stolen and that the second-place runner 'obviously' won the race. In courtroom after courtroom, the cases are dismissed or thrown out due to lack of evidence, and the default conclusion is still that the person who crosses the finish line first is the winner of the race.
So all of the video from all along the racecourse is examined, and no evidence of cheating is found. The second-place runner then claims that every camera was somehow 'doctored' to record only that the first-place runner was ahead of everyone else. Again, no proof of claim is presented, and the default conclusion is still that the person who crosses the finish line first is the winner of the race.
All the while, the second-place runner is making such a nuisance of himself with the Media that several media outlets stop publishing his claims, while the first-place runner uses his victory status to promote improvements in education, health care, and infrastructure projects that will benefit not only the people who cheered him on, but also those who cheered on his opponent as well.
Now, does the second-place runner finally admit defeat? No, he does not. Instead, he arranges to have certain parts of the course of the footrace re-routed to his advantage. He also declares that if he is not proclaimed victor of the last footrace, then those who cheered him on should not attend any more footraces for the next two or three years. Finally, to pay off all expenses he incurred from his endless protests, he starts a GoFundMe campaign and begs his loyal fans to contribute.
Does any of this seem plausible to you?