At the same time, without the principle of Occam's Razor science does not exist. The primary activity of science, formulating theories and selecting the most promising theory based on analysis of collected evidence, is not possible without some method of selecting between theories which do fit the evidence. This is because, for every set of data, there are an infinite number of theories which are consistent with those data (this is known as the Underdetermination Problem). As an example, perhaps you are investigating Newton's famous theory that every action has an equal and opposite reaction. It's easy to think of alternative theories which fit the data equally well. One such theory would be that for every action there is an opposite action of half intensity, but benevolent indetectable creatures magnify the opposing action with input of their own energy so it appears to be equal. These creatures will all die in the year 2055, and at that point the observable nature of the universe will instantly shift. This is an alternative theory which fits currently observable evidence just as well as Newton's theory. Furthermore we are currently unable to collect any evidence that one theory is superior to the other. Because the second theory states these creatures are undetectable, we cannot have any evidence to distinguish between the two theories until 2055. Furthermore, each theory has profoundly different implications for what we should expect of the future (for example, we may choose to live our lives differently if we know that life as we know it will cease in the year 2055). And finally, it can easily be seen that there are an infinite number of competing theories by uncreatively incrementing the year. 2056 is another theory. 2057 is another theory, and so on. Because there are an infinite number of theories which fit any body of evidence equally well, and all make radically different predictions, if science cannot choose between them, then science can never determine any useful theories. So far the only known way to usefully choose between the infinite number of theories which fit a body of evidence is Occam's Razor. For this reason Occam's Razor is seen as an indispensable aspect of science, without which science ceases to function entirely.