This expression is interesting, because it reminds us of the French expression putting the dots on the i » But while the French expression means to be clear in its words, this is absolutely not the meaning of the Anglo-Saxon expression. Dotting the i’s and crossing the t’s, means doing something very meticulously, with great rigor to the smallest details. . It is assumed that putting the letters I and T in the same expression comes from the fact that they could be confused if one does not focus on the first and the bar on the second. Knowing that putting the dots on the I in the French expression, can also involve giving clarifications!