Final answer:
Biological evolution is both a fact and a theory. One incorrect date does not disprove the theory of evolution due to the vast range of evidence supporting it.
Step-by-step explanation:
When you called biological evolution both fact and theory, you were referring to the fact that evolution is both a body of extensively tested explanations supported by evidence and a phenomenon that has been observed in the natural world. The theory of evolution by natural selection explains how evolution occurs, providing a framework for understanding the mechanisms and processes behind it.
If you made a new discovery and found that the date scientists had used to determine the relationship between Old World and New World monkeys was wrong, it would not disprove the theory of evolution because the theory is not solely dependent on one piece of evidence. The theory of evolution is based on a vast range of evidence from various fields of study, including genetics, paleontology, and comparative anatomy. One incorrect date would not invalidate the extensive body of evidence supporting the theory.