What are jar beliefs in public speaking?

Jar beliefs is basically knowledges, that is, justified, true belief. They are beliefs in which any clear-thinking person who understands the evidence provided will all come to the same conclusion. For example, if someone said that water is composed of hydrogen and oxygen then that is a jar belief because we have overwhelming evidence that justifies this conclusion. Thus, jar beliefs are associated with knowledge and facts in public speaking which can be proven with solid evidence.