Is There a Real World Outside?

Shankara dwita vedanta accepts the realist position, but goes further and says, this individual who is experiencing the real world outside, not just mind, real world there. But why? And why am i bringing it up here? Why does he refute the buddhist idealist? Because itis a huge mistake one might make. Go back to the dream example. Let's forget that we do it on we we don't know. You are in your own dream, walking around, meeting people, things ar good and bad, are happening, and you aren't aware of them. Threis a virtual dream world. It's a dream world, and you are