

Which has more problem-solving power-the brain or the computer? Given the rapid advances in computer technology in the past decades, you might think that the computer has the edge. At a global level, the architectures of the brain and the computer resemble each other, consisting of largely separate circuits for input, output, central processing, and memory.

Both the brain and the computer contain a large number of elementary units-neurons and transistors, respectively-that are wired into complex circuits to process information conveyed by electrical signals. It is often compared with another complex system that has enormous problem-solving power: the digital computer. The brain is complex in humans it consists of about 100 billion neurons, making on the order of 100 trillion connections.
