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 noun [C/U]. âº the âstudy of the ânature of âreality and âexistence, of what it is âpossible to âknow, and of âright and âwrong âbehavior, or a âparticular set of âbeliefs of this âtype: [C] the philosophy of Kant [U] Iâd like to take a âcourse in philosophy next âsemester.