This paper describes a context mechanism for a natural language understanding system. Since no sentence is ever perceived outside some context, it is reasonable to inquire into the nature of context as it affects the interpretation of sentence meaning at a deep conceptual level. A theory, called conceptual oyer-l ays, is described. This theory (1) defines C(T 1 ,... ,T i), the context establish...

Organic qualitative analysis is one of the challenging chemical concepts in students learning chemistry. The West African Examinations Council chemistry chief examiners for years, have lamented on students’ poor performance organic at senior high school level. This study, therefore, investigated conceptual understanding analysis. Convergent mixed methods procedure was used to collect both quant...