#403 Scientific Method

The logic of the scientific method was set out by John Stuart Mill in 1843 and was [1] the method of difference. A simple example of what he [2] by this is to take two glasses of water which are identical in every [3] . Introduce a few drops of ink into one of these glasses. The water changes color! [4] to Mill’s method of difference it is safe to [5] that the change in the color of the water is due to the [6] of a new factor — the independent variable — in this case, the ink.