Epistemological explanations

Epistemological explanations characterise the world in terms of human knowledge, for example in the case of language:

• FORM: structure and interpretation function
• SUBSTANCE: semantic domain and phonetic domain
• COGNITIVE REALITY: external evidence for form -- `competence', `knowledge', `cognition', `mental models', ... , `neural networks'
• EMPIRICAL REALITY: external evidence for substance -- `performance', `action', `behaviour', `physiological models', ... , `brain models'