There is no such thing as the subtraction property of knowledge because knowledge only expands, never detracts. However, as knowledge expands, the comfort zone of a subject compresses. Its true meaning becomes vague just like an exploration of the ocean. The closer you are to the shore, the more secure you are but as soon as you explore the great ocean of uncertainty, you will feel lost and alone, but to turn back is an act of impossibility. To feel disappointed and give up is to accept your defeat to the ocean. The only thing you can do now that will have any meaning at all will be to continue without fear and hope that your discovery will be handed down to those at sea which will eventually be passed near the shore.