Artificial intelligence is a difficult term to define as it can mean different things to different people and has divided the scientific community for decades. While today's technology may be limiting, intelligence in humans and machines must evolve over time. It is not possible to measure the degree of intelligence in a person as all people have different abilities, for example some excel at math but not language. If development of intelligence is limited to current technology, machines will replace workers as they are more efficient and productive with only an initial investment.