Sentence:  Eager as he was to pursue this promising <WSD>line</WSD> , he was so loaded down with the management of the pharmacy and lectures in the medical and pharmaceutical faculties at the university that he could devote only Sunday afternoons to `` galvanizing '' . 
Meaning of the word marked with <WSD> tags:  a course of reasoning aimed at demonstrating a truth or falsehood; the methodical process of logical reasoning