this lesson goes by multiple names, including "fool me once, shame on you; fool me twice, shame on me" and "when someone shows you who they are, believe them the first time"
Some folks are giving the current administration the benefit of the doubt when it comes to binning NIH proposals into three broad bins instead of individual scores, ostensibly to solve a problem many complained about.
“Beware of Greeks bearing gifts” especially after they’ve already ravaged Troy.