What made Kemp’s scientific mind reconcile to the existence of an invisible man? Why were his queries evaded by Griffin?

Kemp had a scientific mind and he had given a demonstration in the morning to prove that the invisibility was nothing more than a trick. However, the same evening, to his great surprise He heard a voice in his bedroom calling out his name. the blood stains around him were inexplicable. Then he saw a well tied but empty bandage suspended in mid air. All these things proved that somebody was present in his room, though he was not visible. When the invisible men had a scuffle with kemp, he had no choice but believe in the reality of invisibility. On seeing him eat food drink whisky, kemp could not argue that invisibility was impossible. His scientific approach was defined by the concrete proofs that he had in front of him. However, he was acutely intrigued to find a man who was invisible. His scientific mond could not reconcile to such a phenomenon. Hence, his curiosity prompted him to ask the invisible man how had he become invisible. Not willing to share his knowledge with Dr. kemp, and being too sleepy and hungry, Griffin evaded this query. Next Dr Kemp asked Griffin about his monetary source which was claimed to have been taken away by Marvel. Griffin evaded this query too, since all the money that he had accumulated was earned by indulging in theft. In passing, Kemp also wished to know how marvel, in spite of not being invisible, became his confederate. Griffin evaded this question as well thinking that an answer to this sensitive probing would lead to many other uncomfortable queries. Hence, griffin very cleverly evaded the queries of Kemp to plug complications