Question

Pen is mightier than sword? Change from comaparative degree to positive and superlative degree.
Why the answer can't be as follows
Positive degree : No other sword is as mighty as pen.
Superlative degree : Pen is mightiest than any other sword.

Answer 1

no other sword is as might as sword like
pen (positive degree)

pen is nighter than any other sword

Answer 2

pen is as mighty as sword (positive s)

pen is mightiest than sword