There's a lovely scene in John Wyndham's "Trouble with Lichen", the basic story of which is that two research scientists discover a genuine cure for aging. The man is pretty stuck what to do, but the woman sells it as an anti-aging cosmetic (the logic being to introduce it in a subtle way, rather than making oodles of money.)

Anyway, she is called to task in an interview when the effectiveness is revealed and wasn't she being deceitful selling such a powerful treatment without telling people? Her response isthat she did tell people and that the case against her seems to be that she had claimed it worked and it did, whereas everyone's else claimed their treatments worked but didn't, and the interviewer was accusing her of deceit? "I think you are on shaky ground there."