speciously

Adverb

In a specious manner; fallaciously and erroneously, but seeming superficially to be correct.

Japanese Meaning

一見正しそうに見えるが、実際には誤りや論理的な欠陥を含む様子 / 表面的には正当に見えるが、実は根拠の薄い、誤った理由付けを含む状態

The politician speciously attributed the economic gains to his own policies, ignoring the broader market forces.

その政治家はもっともらしく経済の好転を自分の政策のおかげだと主張し、より広い市場の動きを無視した。

Sense（1）

In a specious manner; fallaciously and erroneously, but seeming superficially to be correct.

more speciously

（ comparative ）

most speciously

（ superlative ）