What is the extent of the influence of environment on intelligence?

The assertion that the extent of the influence of environment on intelligence is "unknown to scientists" captures the complexity and ongoing debate in the field of intelligence research. While various studies have shown that both genetic and environmental factors contribute to intelligence, determining the precise degree of influence exerted by environmental factors, such as socio-economic status, education, and life experiences, remains challenging. Scientists continue to explore and gather evidence regarding these influences, making it clear that the relationship is not fully understood and is subject to varying interpretations.

In contrast, options suggesting that scientists know exactly or that the environmental impact is either minor or negligible oversimplify a nuanced topic that is still being actively researched. Intelligence is influenced by a combination of numerous and intricate elements, and prevailing theories often accommodate ongoing findings rather than presenting a definitive conclusion. This option reflects the current state where researchers acknowledge both the influence of the environment and the limitations of existing studies, emphasizing the need for further investigation.