What does it mean to "Understand" something?

WIP - summary of what it mean to understand. Do you actually have to "experience" the thing you are attempting to understand (pregnancy, being a different race, being dead) to understand it (I think not). This is a conflating of two different ideas - understanding (to be defined) vs having a first person subjective experience of "what it is like" to be in the situation you are attempting to understand. Obviously we cannot solve the "hard problem of consciousness" and know what it is like to be a dog or a bat, but we can understand these things. Given the number of dog and bat experts out there, obviously some of them understand their subject matter. If you add to the definition of "underand" to also require a personal first person experience of what it is like to be that thigns, then you have defined it so strictly that no person could ever understand anything, and therefore no one in the world understands anything. Thix is clearly not the case, so I think that this is just a really bad and useless definition of "understanding" Some of my associates assert you can't really even "understand" a rock or a table. This is nonsense.