If by computer, you mean a binary computer using transistors, there's no reason to think you can make it do anything a brain can do. Alternatively, if computer

If by computer, you mean a binary computer using transistors, there's no reason to think you can make it do anything a brain can do. Alternatively, if computer means any hypothetical hardware, it may very well end up looking like a brain, in which case you might just call it an artificial brain rather than a computer.