The phrase "plausible mechanism" refers to a logical and reasonable explanation or process that can explain how something happens or works. It suggests that there is a possible and believable way for something to occur. Full definition
While the precise pathways underlying the potential protective effect of breastfeeding on overweight and obesity remain unknown, several plausible mechanisms have been proposed. (who.int)
We suggest that a more plausible mechanism of change in psychotherapy is acquisition of adaptive emotion regulation strategies. (cambridge.org)
Although well - conducted prospective cohort studies are important and valuable in determining associations between nutrient intake and risk of disease, there is more confidence in these results when they are supported by biologically plausible mechanisms for the observed effect. (health.gov)