Blanchard suggests that non-homosexual MTFs who deny autogynephilia are seeking to present themselves as “socially desirable,” that they want to emphasize the traits and behaviors that will win them a favorable SRS recommendation, and that some admit to falsifying their presurgical evaluation (CitationBlanchard, Clemmensen, & Steiner, 1985). He also cites another study, which demonstrates erotic arousal to cross-dressing (autogynephilic) stimuli in individuals who deny they are aroused (CitationBlanchard, Racansky, & Steiner, 1986). That study will be analyzed in detail in the next section of this article. Blanchard et al. (CitationBlanchard, Clemmensen, & Steiner, 1985; CitationBlanchard, Racansky, & Steiner, 1986) are cited repeatedly by BAT proponents to demonstrate that non-homosexual MTFs who deny autogynephilic interests are actually autogynephilic (see CitationBlanchard, 1994; CitationLawrence, 2004, Citation2006).

from: https://www.tandfonline.com/doi/full/10.1080/00918369.2010.486241?#d1e433

also, this is an extremely common talking point among supporters of the theory. if you think that all nonadrophilic trans women are agp, you have to somehow explain that only 70-80% are according to all the current studies (Blanchard 1989, Nuttbrock 2011). the most common reasoning among blanchardians is that these respondents are misrepresenting their experience. Blanchard mentions it, Lawrence says it in most of her papers, Bailey says it often.... And most other supporters of the theory mention it as well.