Analogy is a kind of Inductive argument based on imperfect resemblance between two things. Analogy does not conclusively prove a causal connection but it is most fruitful source of hypothesis. When we find two things resemble each other in certain important attributes, we frame the hypothesis that they will possible resemble each other in other respects. We find that the Earth and the planet Mars resemble each other in possessing similar kind of atmosphere, land water etc. We suppose that the planet Mars will further resemble the earth in being inhabited by living creatures.

Analogy is divided into two kind’s viz :

(a) Good Analogy and

(b) Bad Analogy.

The strength of Analogy depends on the number and the importance of the points of the difference and the number of the unknown points. So, a God analogy means an argument in which a conclusion is drawn from the presence of essential resemblance between two things.

For example: When we find that the earth and the planet Mars resemble each other in processing similar kind of atmosphere, land, water, etc. we suppose that the planet Mars will further resemble the Earth in being inhabited by living creatures.

A Bad Analogy is one, in which the conclusion is drawn from superficial points of resemblance. For example – plants, like men, have birth, growth and decay and death. Men possess intelligence therefore planets also possess intelligence. This is Bad Analogy, because there is no essential connection between the points of resemblance and the inferred property.