Receiving testimony about a miracle

Hello,
I wanted to ask a question: Is it possible to receive testimony about a miracle? (Even if we assume that a miracle is possible).
Since a miracle is a very, very rare occurrence by all accounts, once a witness testifies that he saw a miracle, we have three options for interpreting it.

1. He was wrong in his vision.
2. He made mistakes in his testimony – he lied, exaggerated, etc.
3. He was indeed right and the miracle happened.

Because the more common situation is that people lie or misperceive (1,2) than miracles occur, it is likely that the witness is lying as well. The problem is that if we assume that the witness is lying, then we can never accept that a miracle occurred. On the other hand, we will never have a good enough reason to assume that it is credible.
I would love to hear what the Rabbi thinks about this?