What do the words of the Mahayana Buddhist mean?

A Mahayana Buddhist said: > Mahayana Buddhists agree that there other sentient beings exist, that > they have discrete mindstreams, and ingest and interpret reality in > accordance to their own karmic dispositions. > > If I encounter you, I believe you are a sentient being, and that you > are not me. But I also recognize that I never interact with you, only > with the impressions of you that my mind has recreated from sensory > contact. > > So my experience of you is 'imaginary' in the sense that all I have is > this mental representation that was constructed within my own mind, > using limited data from where our actions and sense systems have > interactions. > > But you clearly exist on some level, because you can perform actions > that I did not cause, which means that you are not some kind of > phantom my mind created. Can you please explain to me what this means. What does the following mean? > But I also recognize that I never interact with you, only with the > impressions of you that my mind has recreated from sensory contact. That is, does it mean that when he talks to me, he thinks he is talking to an imaginary person? Thank you!