  When members of various thought collectives meet, a peculiar phenomenon occurs. One sees passive elements in one’s thought style, but the active ones remain almost unnoticed. However, “any alien thought style appears like a free flight of fancy, because he can see only that which is active and almost arbitrary about it” (1935a, IV.5). Since passive results obtained within another thought style appear to her as erroneous – as they are built on an arbitrary and false basis—she is not able to see their merits and does not understand that people thinking differently successfully use their own world view. This leads us to the phenomenon called “incommensurability”.