"I think almost all people would think, if I have no common sense or common knowledge in such field, so that is completely disadvantage, but if someone wants to develop some completely new thing, if we are trying to deduce something from such common knowledge, that we will be just trying to develop some step but we have to jump up, so sometime, such kind of common knowledge will be an obstacle, because at that time, most of the chemists thought that it is completely impossible to ionise such big molecule like protein but at that time, at least, I was not a specialist so I can do anything."