Compléter 265-testVersion en ligne 265-test par Farhad Key 1 identical glasses introduction changes was The logic of the scientific method was set out by John Stuart Mill in 1843 , and named the method of difference . A simple example of what he meant by this is to take two of water which are in every respect . Introduce a few drops of ink into one of these glasses . The water colour ! According to Mill's method of difference it is safe to assume that the change in the colour of the water is due to the of a new factor - the independent variable - in this case , the ink .
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