On the other hand , he was charming , well - mannered , and not without humor and imagination .
On several occasions , Leibniz backdated and altered personal manuscripts , actions which put him in a bad light during the calculus controversy .
Leibniz was charming , well - mannered , and not without humor and imagination .
On several occasions , Leibniz backdated and altered personal manuscripts , actions which put him in a bad light during the calculus controversy .