A.

1. The brain is whatever we make it practice to be.
   It takes in input as stimulus and the survival demands we put 
   on it make it what it needs to be.

2. I think we have 5 senses because the brain is an error-prone 
   device. having more input signals to the same reality 
   balances out the errors. this changes the brain from being 
   error-prone to being error-resistant, but it also adds new 
   dimensions to the brain. 

B.

see in your brain, and it's imagination.
touch in your brain, and it's empathy.
taste in your brain, and it's memory.
smell in your brain, and it's nostalgia.
hear in your brain, and it's conviction.