
In his continuing series of interviews regarding military robots, Gerhard Dabringer of the Institut Fur Religion und Frieden talked with Peter Asaro. While the title of the article is in German, the text is in English and can be read here:
Wendell Wallach and Colin Allen maintain this blog on the theory and development of artificial moral agents and computational ethics, topics covered in their OUP 2009 book...


Affectionately dubbed Plasmobot, it will be "programmed" using light and electromagnetic stimuli to trigger chemical reactions similar to a complex piece of chemistry called the Belousov-Zhabotinsky reaction, which Adamatzky previously used to build liquid logic gates for a synthetic brain. By understanding and manipulating these reactions, says Adamatzky, it should be possible to program Plasmobot to move in certain ways, to "pick up" objects by engulfing them and even assemble them. It should be possible to program it to move, to pick up objects and even assemble them. Initially, Plasmobot will work with and manipulate tiny pieces of foam, because they "easily float on the slime", says Adamatzky. The long-term aim is to use such robots to help assemble the components of micromachines.

The researchers set up a group of S-bots equipped with omnidirectional cameras and light-emitting rings around their body in a bio-inspired foraging task (see picture above). Like many animals, the robots used visual cues to forage for two food sources in the arena. Rather than pre-programming the robots' control rules, the researchers used artificial evolution to develop the robots' control systems. As expected, robots capable of efficiently navigating the arena and locating food sources evolved in a matter of a few 100 generations.
This is when things became interesting: Due to the limited amount of food, robots now began to compete for resources. Robots began to evolve strategies to use light inadvertently emitted by their peers to rapidly pinpoint food locations, in some cases even physically pushing them away to make room for themselves. As evolution progressed, the exploited robots were soon all but extinct. A new generation of robots ensued that could conceal their presence by emitting confusing patterns of light or by ceasing to emit light altogether.

Are we close to building a machine that can meaningfully be described as sentient?
I'm an empirical kind of guy, and there is just no evidence of an artificial toehold in sentience. It is often forgotten that the idea of mind or brain as computational is merely an assumption, not a truth. When I point this out to "believers" in the computational theory of mind, some of their arguments are almost religious. They say, "What else could there be? Do you think mind is supernatural?" But accepting mind as a physical entity does not tell us what kind of physical entity it is. It could be a physical system that cannot be recreated by a computer.