Ingarden's talk at the Prague Congress in 1934 was the first serious attack on the verifiability principle, one of the pillars of logical empiricism. My aim here is (I) to recall Ingarden’s objections concerning the verifiability principle (VP, for brevity), (II) to show that Ingarden’s criticism may be supported by additional arguments, with respect to those used by Ingarden himself, and (III) to note that Ingarden’s style analysis of VP may be extended to other metaphilosophical regulative principles.