This is like Cartiesian scepticism [0] justified by attempting to reject the fixed points of the prior in Bayes' rule [1]. The implication is that your belief in something should always be an epsilon away from 100% (and presumably 0%).

[0]: https://plato.stanford.edu/entries/skepticism/#ArguForCartSk... [1]: https://www.austintripp.ca/blog/2018/08/21/bayes-no-certain-...