false or deceptive
specious - false
Something ‘specious’ appears to be true or correct but is actually wrong. This formal word is often used in relation to an argument or claim, but is quite versatile. Most commonly encountered in a professional context.
Rebecca’s claims against the company are based on specious evidence. I don’t believe any of it will stand up in court.
The speciousness of the newspaper story was proven by the total lack of legitimate sources able to corroborate it.
There was a lot of bluster but very little substance to what James said. The board are unlikely to be swayed by such a specious argument.