What can one do with knowings that occur from strong intuition?
Knowing is not dependent upon the external senses, otherwise, how would you know that you have dropped the senses in 2nd Jhana? How would you know the 3rd and 4th Jhanas? Now to answer your question about what is mind. Mind is created or produced by that-which-flows. That-which-flows is the activity of the unborn. Do not think that the unborn is static. It is not, but mind cannot access it. Knowing of the unborn comes by that-which-flows. A glimpse of that-which-flows is the attainment of Sotopanna. Realizing that-which-flows is the fulfillment of Sotopanna (obtaining the fruits thereof). This realization is often called self-realization (not of the ego self). Self-realization is beyond mind. It is the “turning in consciousness” spoken of in the suttas. Consciousness is changed when this realization happens. The first three fetters are dropped and you are never the same.