in a way that seems to be right or true, but is really wrong or false

This inequality was speciously justified by reasoning that women had less need for education than men. 为这种不平等找的虚假理由是女性对教育的需求比男性少。

He claims, perhaps speciously, that the two had a relationship. 他声称这两人有过恋爱关系，这是不实的。