His errors were demonstrated so clearly that by 1670 essentially everyone considered him a mathematical illiterate, yet still he wrote articles in his defence even though it is doubtful whether anyone continued to read them.
Ang kanyang mga pagkakamali ay demonstrated kaya malinaw na sa pamamagitan ng 1,670 mahalagang everyone itinuturing siya ng isang matematiko mangmang, pa pa rin siya wrote articles sa kanyang depensa kahit ito ay nagdududa kung sinuman ang patuloy na basahin ang mga ito.