【読解論理】less A than B

He rejects her argument less,it seems, on grounds of historical inaccuracy than for moral reasons.

彼が彼女の主張を拒絶するのは歴史的に不正確だからというよりむしろ道徳的理由からのようだ

less A than B
Aというよりむしろ B
Not so much A as B
B rather than A
more B than A