Final answer:
A theory in scientific literature is supported by substantial evidence, unlike a hypothesis, which starts with limited evidence. An example is the foundation of the Declaration of Independence on John Locke's theories, a true statement. Modernization theory's claims regarding economic growth and democratic institutions are more debated.
Step-by-step explanation:
The question 'Incubation theory is strongly supported in the literature' with a choice of True or False can be somewhat ambiguous without additional context, but general understanding in scientific literature is that a theory is an idea that has been backed by a large body of evidence. Unlike a hypothesis, which starts with little evidence, a theory is well-supported and has often been tested extensively. For example, Jefferson's Declaration of Independence was based on the well-documented theories of John Locke, which is a true statement and showcases how theories have significant support.
Similarly, while the modernization theory has been discussed in terms of a relationship between economic growth and democratic institutions, saying it has 'clearly established' a causal link might be overstating the consensus within the literature, making it a contentious claim. The impact of the market revolution in the United States, on the other hand, creating numerous social and economic changes, is generally supported as true.