In conclusion: 1  Consider water from any source as contaminated with disease causing organisms. 2  By far the best way to treat water is by boiling it. 3  You only have to bring the water to a boil.  Donât waste fuel; there is no need to boil water for 10-minutes, 5-minutes, or even 1-minute.
Razor (philosophy) In philosophy, a razor is a principle or rule of thumb that allows one to eliminate (shave off) unlikely explanations for a phenomenon. Razors include: Occam's razor: When faced with competing hypotheses, select the one that makes the fewest assumptions. Do not multiply entities without necessity.
Philosophy (BA, DipHE and CertHE) A philosophical education of the very highest academic quality. For thousands of years, people have asked fundamental questions about the world, their place in it, and their relations to each other. These questions, and attempts to answer them, define the subject matter of philosophy.