Symbolically, the method of simultaneous variation can be represented as (with ± represents a displacement): “Method of Concordance.” Merriam-Webster.com Dictionary, Merriam-Webster, www.merriam-webster.com/dictionary/method%20%20Consecite. Access 30 Nov 2020. Mills methods are five methods of induction described by the philosopher John Stuart Mill in 1843 in his book A System of Logic.  They must shed light on issues of causation. This method is also generally known as the most similar system design in the context of comparative policy. What prompted you to look for the method of agreement? Please tell us where you read or heard it (including the quote, if possible). Precisely determining the causes and effects is not an easy task. We can often confuse or misrepreseg the two because we lack sufficient information. Mill`s methods are attempts to isolate a cause from a complex sequence of events.
Under the tailings method, if we have a number of factors that are assumed to be the causes of a number of effects, and we have reason to believe that all factors, with the exception of a factor C, are causes of all effects, with the exception of one, we should infer that C is the cause of the residual effect. Unlike the four previous inductive methods, the method of accompanying variation does not involve the elimination of any circumstances. The change in size of one factor causes another factor to change in size. Perhaps the best way to introduce Mills` methods is an example. Suppose your family went to a buffet dinner together, but when you got home, you started to feel sick and feel stomach pains. How do you determine the cause of the disease? Suppose you draw up a table of foods that are taken by each family member: It is important to remember that the application of the scientific method attempts to confirm or disprove a hypothesis; However, this process must always be considered partial and temporary. The weight we give to a confirmation or rebuttal is never all or nothing. We need to gather evidence over a long period of time. If we make mistakes, they are revealed by the results of repeated experiments.
In this case, you are the only one who is not sick. The only difference between you and the others is that you didn`t make a salad. It`s probably the cause of other people`s illnesses. It is an application of the method of difference. This rule says that if you have a situation that leads to an effect, and another that does not, and the only difference is the presence of only one factor in the first situation, we can infer that factor as the cause of the effect. The method of accompanying variation says that if, in a number of situations that lead to a particular effect, we find some ownership of the effect that varies with variation in a factor common to these situations, then we can infer that factor as a cause. Even simply referred to as the “common method,” this principle represents only the application of methods of concordance and difference. Knowledge expands when we can verify or distort a hypothesis.