Are you claiming vitamin D deficiency is not common?
No.
EDIT: Do you mean literal vitamin D deficiency, or what vitamin D deficiency is a metaphor for in my comment?
I mean literal vitamin D deficiency, because I had thought vitamin D deficiency was one of the best examples of the evolutionary heuristic.
Are you claiming vitamin D deficiency is not common?
No.
EDIT: Do you mean literal vitamin D deficiency, or what vitamin D deficiency is a metaphor for in my comment?
I mean literal vitamin D deficiency, because I had thought vitamin D deficiency was one of the best examples of the evolutionary heuristic.