Knowing failably and Moorean assertions

Knowledge-fallibilism is a species of genus that I call knowledge-failabilism. Each theory knowledge's nature. One apparent challenge to knowledge-failabilism's truth the prima facie absurdity Moorean assertions like ‘It's raining but do not believe it is.’ Does each such assertion convey an implicit and unfortunate contrast, even contradiction? argue this Untenable Contrast analysis fails: no contrast present within speaker's perspective at pertinent time.