I actually met the surgeon who did the operation. He is now in his 80's and told me he did both the operations on Biden when he was the neurosurgeon at Walter Reed. The first one resulted in 1/4 of Biden's brain being removed. The second took another 1/4. In other words, Biden actually has 1/2 a brain. This is why he has no filters and can't control what he says and does. It's actually scary to realize that the man who is a heart beat away from the Presidency has 1/2 a brain.