Question

Actually, at that time he was the wisest of all(comparative)​

Answer 1

Actually, at that time he was wiser than all.

• Here, the adjective is 'wisest'. And, it is in its superlative degree.
• A superlative degree is used when we are comparing the subject with the whole of a group.
• Herein, 'he'(the subject) is compared with 'all'(the group). Thus, the superlative degree of 'wise' is used.
• The three degrees of wise are: "Wise, wiser, wisest."
• Here, 'wise' is the positive degree, 'wiser' is the comparative degree and 'wisest' is it's superlative degree.