scheinbar richtig

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specious
Beautiful, pleasing to look at
Seemingly well-reasoned or factual, but actually fallacious or insincere; strongly held but false

This idea that we must see through what we have started is specious, however good it may sound.

{a} showy, plausible, striking, pleasing
plausible
Apparently right; superficially fair, just, or correct, but not so in reality; appearing well at first view; plausible; as, specious reasoning; a specious argument
Presenting a pleasing appearance; pleasing in form or look; showy
plausible but false; "a specious claim" plausible but false; "specious reasoning"; "the spurious inferences from obsolescent notions of causality"- Ethel Albert
Something that is specious seems to exist or be true, but is not real or true. It is unlikely that the Duke was convinced by such specious arguments. seeming to be true or correct, but actually false (speciosus , from species; SPECIES)
Having an attractive appearance intended to generate a favorable response; deceptively attractive
plausible but false; "specious reasoning"; "the spurious inferences from obsolescent notions of causality"- Ethel Albert
Seemingly well-reasoned or factual, but actually fallacious or insincere
{s} having the appearance of truth while in actuality being false; deceptively appealing, superficially attractive
based on pretense; deceptively pleasing; "the gilded and perfumed but inwardly rotten nobility"; "meretricious praise"; "a meretricious argument"
plausible but false; "a specious claim"