It would seem that Giovanni was the more certain.

Giovanni was sure; at least Maria said so in her letter.

At receiving this reply Jeanne flared up.

How could he be sure?
what did he know about it?
Maironi could not play a single chord on the piano.

Good grounds for certainty indeed! Noemi observed submissively that he might have learned in three years; that the monks had their reasons for training brothers to play the organ.
"Then you believe it too ?" exclaimed Jeanne.