What are the main sources of hypothesis?

1. General Culture:

The general pattern of culture helps not only to formulate a hypothesis, but also to guide its trend. The culture has a great influence upon the thinking process of people and hypothesis may be formed to test one or more of these ideas.

2. Scientific Theory:

The knowledge of theory leads us to form further generalizations from it. These generalizations form the part of hypothesis.

3. Analogies:

Sometimes a hypothesis is formed from the analogy. A similarity between two phenomena is observed and a hypothesis is formed to test whether the two phenomena are similar in any other respect.