You can never prove or show it probable that somebody experienced a miracle

A miracle is what is not naturally possible. It is a supernatural occurrence. It is paranormal.
 
Religion uses miracles as evidence for the truth of its claims.
 
Miracles are events that seem to be against nature or the way natural law usually runs. In other words, they cannot be explained by nature. Examples are the Blessed Virgin Mary appearing to children, the unexplained cure of incurable illness, blood coming out of nowhere on Catholic communion wafers, the sun spinning at Fatima in Portugal in 1917 and most importantly Jesus Christ coming back to life after being dead nearly three days. It is thought that only God can do these things.
 
Suppose the Virgin Mary miraculously appears to some children. You discover they show every sign of telling the truth. What you have evidence for is not that Mary is appearing but that they are telling the truth as they see it. Believers should be saying, "We believe they are being truthful that they are experiencing apparitions possibly of the Blessed Virgin." They should not be saying, "We believe Mary is appearing to them." It's not enough to prove they are having apparitions. The important thing is who is appearing. But that can never be proven. Miracle believers have a vicious circle, "John says Mary appears to him. John is really having apparitions. Therefore Mary is appearing to him." That is not an argument. It is assuming the thing that needs to be proven.
 
They are really saying, "There is no evidence that it is Mary they see therefore it is Mary they see." This is a logical fallacy. They are putting the evidence that the children tell the truth before the evidence that the entity is Mary. They have to for the evidence that it is Mary does not exist. Mary cannot be pleased by people who follow apparitions for they end up not following her but deceiving themselves. They only seem to be her followers. Miracles lead only to idolatry.
 
Another example of this fatal problem would be how the apostles testified that they met Jesus Christ in visions after he rose from the dead.
 
If I control your perception of your wife, what you have the relationship with is not her but this perception of her. She is not your perception of her. Even if the perception is right at times, your motive is to follow the perception not the truth.
 
Miracles speak of the believer's intent to believe in them because he wants to. Truth is not his concern. For this reason, we should assume that God does not do miracles and miracle reports are not based on the truth. This is not being biased. You are not biased if you mistrust what is suspect.