No one will give a definite yes or no answer to such a question. The fact of the matter is that all this is based on doubts, suspicions (which often have good grounds). So no amount of endless match-fixing discussions about whether it's effective to rely on statistics or on underhanded intrigues (which are only speculated about) will lead to the right choice. By the way, this is a normal situation in sports. It would be abnormal if it were assumed that match-fixing did not exist.