Is certainty possible, this is a very difficult question as there are different definitions of certainty. To be able to establish whether certainty is possible the different levels of certainty have to defined and understood before we can question whether it is possible. To be certain of a matter one would have to be knowledgeable on the subject in question, therefore I will try to explain certainty and whether it is actually possible?
             It is argued that without knowledge or beliefs, certainty is an impossible concept. For a person to be certain of an event or outcome that person has to have knowledge or a belief on the situation. If a person is certain that it is going to rain tomorrow, they would either have knowledge that it will rain, or they would believe from what they know that it is going to rain. Even in England it is impossible to be certain that it will rain tomorrow. However if to the best of ones knowledge one believes it will rain then one, depending on the level of knowledge could be quite certain that it may rain. However this is not certainty, as one is not totally convinced even though ones knowledge on the matter may be adequate for one to believe that it may rain, but not enough for absolute certainty.
             For this to be true there has to be a difference between the certainty of belief and certainty of knowledge. The difference is that there is a vital difference in the level of certainty that is meant by 'knowledge' and 'belief'. One way of thinking of the difference could be that knowledge, is knowledge on reality and beliefs, are on the uncertainties and probabilities.
             However it is argued that the strength of knowledge is corrupted when the subject of the knowledge isn't consistent, where differences in knowledge can occur due to the evolution of society or the environment. Protagoras, the Greek philosopher who had many theories on certainty, believed that the sun went around the ea...