What is the difference between A-Life and Artificial Intelligence?

According to the International Society for Complexity, Information, and Design (ISCID):

Artificial Life does overlap with Artificial Intelligence but the two areas are very different in their approach and history. Artificial Life is concerned with specific life-oriented algorithms such as genetic algorithms which can mimic nature and its laws and therefore relates more to biology, whereas Artificial Intelligence tends to look at how human intelligence can be replicated, therefore relating more to psychology. ( http://www.iscid.org/encyclopedia/Artificial_Life)

This question is much more complex than it may appear on the surface. This is partly due to the fact that there is much disagreement among experts as to the definitions of "life" and "intelligence." However, even without firm definitions for these terms, it is possible to differentiate artificial life and artificial intelligence.

Artificial life in its fully realized form would be any man-made living "thing." Whether this "thing" was composed of organic chemicals, or electrons flowing through silicon, or any other material would make no difference. The current and rapidly advancing state-of-the-art in computers, along with their ability to simulate complex processes, makes them an ideal tool for abstracting and exploring aspects of living systems - some would even say to synthesize living systems.

Artificial intelligence is any man-made thing that is capable of exhibiting some behavior that is consistent with human or animal (i.e. organic) intelligence. Since all known forms of natural intelligence are embodied in organic living systems, it is not surprising that there is some overlap between the fields of artificial life and artificial intelligence. However, we generally do not use the term "intelligent" to describe all living systems. Plants, for example, are alive, but they are not considered to be intelligent. So, while artificial life might include the study of artificial intelligence, it is not a necessity.

At the same time, not all intelligent systems need be alive. A computer program that plays chess at a master's level exhibits intelligent behavior. Yet, it is not a living thing. So, as artificial intelligence is not a necessary part of artificial life, it is also not a solely sufficient element.