1. He demonstrates supernatural knowledge of the future.
2. He is a pious Torah scholar and claims to be a prophet.
3. He has deep spiritual experiences communing with G-d.

If everything he predicts comes true, without exception, then we accept him as a prophet because the Torah commands us to.

Performance of miracles,in and of itself, does not prove that he is really a prophet. (Of course, if he contradicts the Torah, then we know he is lying, since we only accept him in the first place by the authority of the Torah). (Maimonides)

1. He demonstrates supernatural knowledge of the future.
2. He is a pious Torah scholar and claims to be a prophet.
3. He has deep spiritual experiences communing with G-d.

If such a person claims prophecy, and what he commands in G-d's name has clear religious value, then he can be accepted as authentic. (Rashi)

1. He demonstrates supernatural knowledge of the future.
2. He is a pious Torah scholar and claims to be a prophet.
3. He has deep spiritual experiences communing with G-d.

A claim based on these experiences is not accepted, for a number of reasons: First, how do we know what he experiences? We have to trust him about the experiences, but it is precisely his credibility which is in question! Second, how do we know that he is experiencing G-d, rather than merely having a vivid, personal experience, with no connection to reality at all?