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| | Al-Razi - Definition, explanation |
 | | Abu Bakr Mohammad Ibn Zakariya al-Razi محمد زکریای رازی (according to al-Biruni, born in Rayy, Iran in the year 251/865.; died in Rayy, Iran, 313/925), was a versatile Persian Philosopher (hakim), who made fundamental and lasting contributions to the fields of medicine, chemistry (alchemy) and philosophy. |
 | | Razi's alchemical experiments suggested other qualities of matter, such as "oiliness" and "sulphurousness", or inflammability and salinity, which were not readily explained by the traditional fire, water, earth, and air schematism. |
 | | Razi believed that contemporary scientists and scholars, because of accumulated knowledge at their disposal are, by far, better equipped, more knowledgeable, and more competent than the ancients. |
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