which of the following statements about natural and artificial concepts are correct?
1. Natural concepts develop primarily through everyday experiences.
2. Artificial concepts are defined by strict rules and explicit criteria.
3. Natural concepts always require formal definitions for category membership.
4. Artificial concepts usually have clear and precise category boundaries.
Options:
(A) 1, 2 and 4 only
(C) 2 and 3 only
(D) 1, 2, 3 and 4
(B) 1 and 3 only
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