Extransensory perception, or ESP, is the process of perceiving events outside of the known channels of sensation, such as seeing, hearing, and touch. Is it possible to predict the future? Is it possible to read someone's mind? Is it possible to detect the presence of a person or object that is hidden from view or perhaps invisible to the human eye? These are the questions that rage in the widely debated subject of ESP.
The skeptic's view of things is that there is no hard evidence for the existence of ESP, no scientific proof or data to back it up. There are many reasons why so many scientists deny the existence of ESP, such as the fact that if an experiment was done that showed proof of ESP, the results were a fluke, or that it was simply a faulty experiment. Say there is a subect sitting at a table with cards in front of them, and the experimenter watches from beyond to see if they pick the correct card, thus demonstrating ESP. Skeptics would say that the subject could easily pick up on the experimenter's body language, and would thus be able to tell which card to pick. Another large problem with ESP is that it is unreplicable. ESP, if it existed, would be different with different people, and there is no real way to measure it for the purposes of collecting data.
As for the believers, they find fault witht he implication that providing a logical explanation for apparent psychic phenomena disproves the existence of ESP. Even the believers know that many psychic demonstrations are fraudulent, but that doesn't mean that it doesn't exist.
In the end, the only sure conclusion that we can come to is that the existence of ESP is uncertain. Some would say that just because something doesn't make sense, or we don't know how it works, that doesn't mean we can just rule it out as a possibility.