definition of naturalistic fallacy
The naturalistic fallacy is related to, and often confused with, the is-ought problem (as formulated by, for example, David Hume). As a result, the term is sometimes used loosely to describe arguments which claim to draw ethical conclusions from natural facts.
Ethnographic Fallacy. This fallacy is  the assumption that we can make inferences about society based on individuals. In reality, other forces than the ones we are studying may be determining aspects of society.