The T-800 Terminator is a formidable robotic assassin and soldier, designed by the military supercomputer Skynet for infiltration and combat duty, towards the ultimate goal of exterminating the human resistance. It can speak naturally, copy the voices of others, read human handwriting, and even genuinely sweat, smell, and bleed. To detect the Terminators, who are otherwise indistinguishable from humans, the human resistance uses dogs to alert humans to their presence. The most notable science fiction characteristics are that of an expert system featuring strong AI functionality combined with machine learning, and the system can interpret arbitrary non-formalized tasks. The other notable science fiction component is that of a power source which can last 120 years.