  It is peculiar that those who participate in social creation of a thought style do not sometimes realize it either. After years they do not remember that once they perceived and thought differently, and they recall their research not as a winding road, full of turns, blind steps, successes resulting from compensation of accidental errors, etc. And above all they do not record in their memory those moments when new ideas appeared as a result of misunderstandings between researchers. Fleck compares Wassermann’s texts from different periods and his memories on the road which his team took and which finally led him to the discovery of reaction that now carries his name. This comparison shows that after years Wassermann did not realize how in the past, during collective debates and research, facts and meanings of words, research problems and methods of solving them had changed. “(…) after fifteen years an identification between results and intentions had taken place in Wassermann’s thinking. The meandering process of development (…) had become a straight, goal-directed path” (1935a, III).