
Although Star Trek is an old movie that is released around 1970, I have to say that it reminds me another famous science fiction movie: Matrix. Both movies engage me to consider the reliability of our sensation. According to my understanding, sensation is the only connection between our minds and the outer world, but is sensation trustful?
In the Matrix, the whole human world is created by computer program. People's senses are triggered by electric signals, which means that human judgements toward the "real world" are totally controlled computer. In the Star Trek, Captain Pike's sensation is also controlled by aliens, and he cannot tell the difference between the real world and the illusions.
In fact, the reliability of sensation has been discussed for a long time. Some people think that our sensation varies in different situation and is largely affected by our emotions. Sometimes, we cannot even distinguish dreams from reality. However, most our knowledge is derived from the sensation (knowledge like ice is cold and translucent). If sensation is not trustful, how can we gain and justify the knowledge?