You aren t as right as Martin either Since you insist I asked you Please show us when the length of the metre fluctuated since the 1983 redefinition due to a change in the physical speed of light Boldface in original You didn t answer but instead treated us with the nth reiteration of your chronic argument Following that exegesis I asked you Now please answer my question Has the length of the metre changed since the 1983 redefinition due to a change in the physical speed of light Yes or no please If yes please cite a reliable source Boldface in original Still no answer You don t respond to others questions or arguments you merely repeat yours That accomplishes nothing and persuades no one I ll leave it to others to make their own judgments about whether your behaviour is tendentious since there is no way that you will recognize that it is Talk