This-essay is a7808161.htm which is available at the web-site www.essayz.com. See more notes at the bottom. Previous-Essay <== This-Essay ==> Following-Essay By-Months By-Years By-Words Webs of Like-&-Un-Like ESSAYS <==> Like-&-UN-Like This-One ========================================================== %EXPLANATIONS 780816 Our explanations attempt to make what we regard as unusual---to appear understandable in terms of what we regard as familiar. If we differ as to what we regard as unusual and familiar, our explanations will not make much sense across those differences. Jack may take for granted what Jill regards as unusual, and seek to explain what Jill regards as familiar in terms of what Jill regards as unusual. This will perplex Jill! Jill will regard such behavior as unusual---even though Jack will find it very logical. Unless Jack and Jill are agreed as to what is unusual and what is familiar; they will not agree as to what are reasonable explanations, and what are not reasonable explanations. Aristotle regarded motion along a straight line at constant speed as unusual---requiring am explanation. Aristotle regarded motion towards the surface of the earth as familiar---requiring no explanation. It was the nature of objects to tend towards the surface of the earth. Aristotle's explanations survived for many hundreds of years---but bore no practical results. Newton took a different point of view. He took what Aristotle regarded as requiring an explanation, and decided to regard it as familiar---not requiring an explanation. Newton decided to regard motion along a straight line with constant speed as natural; hardly what we would normally call "familiar". Newton's choice occasioned the need for many explanations! Newton then had to explain the motion which Aristotle regarded as natural---not needing an explanation. Newton invented "gravity" to explain falling. Air friction was invented to explain the slowing down of objects moving quickly through air. Contact friction was invented to explain the slowing down of sliding objects. Viscosity was invented to explain the slowing down of boats in water when the wind failed a ship. Even motion in "perfect circles" had to be explained by Newton; e.g., planets about the sun. The whole world was filled by Newton with needs for explanations---where no needs had existed before. Newton's perspective bore many practical results---but has survived only a fraction as long as did Aristotle's perspective. (c) 2005 by Paul A. Smith in www.essayz.com Search for Integrity and Honesty (On Being Yourself, Whole and Healthy) ==========================================================Lines beginning with a percent sign are KEYWORDS for use in ESSAY-System Searches. Their terminal digits are dates of writing in the format @yymmdd#, where @ = a means 99, @ = b means 20, and # = is a within-date essay-count. Links to date-adjacent essays are near page top & bottom.
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