I want to know the answer to the following question:
While race difference possible to easily see, they need not be given what?
All the background I'm provided with is that "In a response to Livingstone, Theodore Dobzhansky argued that when talking about race one must be attentive to how the term is being used: "I agree with Dr. Livingstone that if races have to be 'discrete units,' then there are no races, and if 'race' is used as an 'explanation' of the human variability, rather than vice versa, then the explanation is invalid.". Is that enough to answer the question?
Answer: no