Which one?The Christian? This is refuted for the following reasons:
1 God is defined as almighty and all-kind.Such a god could not have good reasons to cause/allow suffering. Since this does not fit with the moral concept of the vast majority (if not all) human beings, there can be no almighty and from a human point of view universal God.
2 God is defined as almighty and willing to relate.It should have a unified important message for all people. Since most people have not heard his message or misunderstood it, there cannot be a God who is at the same time almighty and willing to relate with a unified message.
3 God is defined as almighty, kind and listening to prayers.In several studies (e.g. by the Christian Templeton Foundation) it could only be established that prayer and inaction differ edify by nothing. Consequently, there can be no almighty, all-kind God listening to prayers (and the concept of prayer is nonsensical anyway, given the claim that God has a firm plan).
Volker Dittmar said: “This investigation has been carried out several times – the investigations are called STEP and MANTRA – and no influence of prayers has been found.Consequently, there is no God who helps sick people from time to time in prayers, according to opaque rules.
Thus such a god is scientifically refuted.Now it is often argued that God cannot be tested (how do you want to know?). In other words, if one tries to prove it through scientific experiments, then it withdraws and does nothing at all. This is an additional assumption, ad hoc, because there are no reasons to accept it. It is also contrary to the recommendation of believers that one may pray to God, then one would already find out that He exists, because He helps one. If God were so that he could not be tested, this recommendation would be wrong and wrong. Moreover, any argument that says ‘I have prayed to God, and he has helped me’, would be wrong. You can’t know, and since God has been tested, he shouldn’t have done anything, that additional assumption would be right.”
4 God is defined as omniscient and endowed with free will.If he can see the future, he can also see his own actions and is therefore a puppet of his visions. If he can act differently than he had anticipated, he cannot correctly foresee. So there can be no omniscient God with free will.
5 Jesus says in Matthew 10, 23, Matthew 16, 27+28 and Matthew 24:30-34 that his return is so close that some people who are listening to him will not die until he returns.He even says that the disciples fleeing from persecutors would not even come out of Israel until he returned, and we also read in the letters that not all those involved would die until the end of the world came.
6 In John 17:20-23, Jesus says that the world should know that he is the Son of God, that there will be unity among all who believe in him.The history of the Church refutes his sonship of God in a very impressive way.
You may have had personal experiences that you interpret as encounters with God.Please keep in mind that all the above points are still valid. Even if you have met a God – the biblical cannot have been, at least not in the form as defined.