1. What is the mind’s physical basis?  We know the answer since a long time: 
    
    > The mind’s physical basis is the brain.
    
       But that’s not the real issue. The real problem is:   

    > What is the *mind*?

2. One may use as a working definition:    

   > The mind are the mental processes of the brain.

   These processes constitute the human data processing to construct information. This information allows the person to behave and to act as an agent. 

   The details are researched by neuroscience and cognitive psychology - but not by musing about metaphors from Heraclitus or about etymology like Heidegger did.