Cosmo’s comment is clearly a lie, not clever misdirection. Not weighing himself cannot be construed as not gaining weight. All he needed to say was that he had not noticed any weight gain for several weeks to give Roz the impression that he hadn’t gained weight and prompt her to ask “What’s your secret?” He could then answer to Roz’s question by saying “I’ve stopped weighing myself.” “Not noticing” is NOT a lie.
Cosmo’s comment is clearly a lie, not clever misdirection. Not weighing himself cannot be construed as not gaining weight. All he needed to say was that he had not noticed any weight gain for several weeks to give Roz the impression that he hadn’t gained weight and prompt her to ask “What’s your secret?” He could then answer to Roz’s question by saying “I’ve stopped weighing myself.” “Not noticing” is NOT a lie.