It is the benefit from the not clear result or unknown result.
There is uncertainty and doubts in the surrounding but it is not clear that 100 percent is wrong or 100 percent is right.
सहि उत्तर नहुदाको फाईदा ! संकाको सदुपयोग
He did not pay me my 5000 rupees. I thought he is not that fellow with not paying back, still I am not sure. So, I am giving him benefit of my doubt.