RE: Understanding Philosophy: Insights from Ramos and Zulueta

I understand why you find it hard to identify precisely the two classes of philosophers. It is not explicit in the material. The quote below implies that everybody is a general philosopher:

She describes him as someone involved in “trying to explain the nature and origin of the universe through reasoning.” Such a person is involved in philosophizing and can be categorized as a general philosopher.

However, the implication of the above quote is that there are philosophers who specialize in this field, and by implication, they are the specialists.