An Analysis of "On Certainty" I've been tweaking my idea of bedrock beliefs as a replacement for Wittgenstein's notion of hinge proposition. Instead of bedrock beliefs which sound too personal and don't convey the shared nature of these beliefs, I've changed the wording to capture both the personal and their shared nature. A name that seems to fit this idea more appropriately is bedrock convictions, which capture their personal and shared nature. Personal in that all of us have these convictions and shared because all of us share these convictions as a necessary part of life and language. For example, as individuals and as part of a community we act with our hands is a conviction that stands as a necessary part of our background. I don't say "I have hands" before acting, I just act. So, our acting is at the bottom of the language game (OC 204).
Bedrock convictions (hinges) are also split into prelinguistic convictions and linguistic convictions. Prelinguistic convictions are shown in simple actions like picking up an object which reflects the conviction that I have hands. Our actions show these convictions apart from language, but they can also be expressed as part of language, however, language comes later. As language forms it will convey another layer to these convictions, viz., linguistic convictions, such as the rules of chess. Prelinguistic convictions are not subject to doubt because the use of the concept of doubt is a linguistic function (it's not necessarily a linguistic function, although the concept is) especially as part of Moore's argument and as part of the skeptic's argument. The prelinguistic props up the linguistic. It would be logically impossible for the latter (linguistic convictions) to exist without the former. This is why the skeptics' doubting is nonsense. We don't start with doubts, we start with subjective and collective certainty that enables the language games of JTB and the language games of doubting.
I'm further arguing that Wittgenstein's hinge propositions are probably a necessary function of Moore's reference to his statements as propositions and not so much that Wittgenstein thinks of them as traditional propositions. This seems obvious given Wittgenstein's reference to Moore's statements as hinges. But there is an important point that Wittgenstein's writing alludes to, viz., that hinges are not true in the traditional epistemological or propositional sense. In other words, they don't carry truth values in the same sense that traditional propositions do where they're open to verification or falsification. Bedrock convictions aren't subject to the justificatory machinery of JTB. They are the frame that stands fast for the machinery of JTB (JTB for me consists of different language games in the Wittgensteinian spirit). So, the truth of bedrock convictions is tied to the language game of conviction rather than justification. Normal propositions (true and false propositions) are subject to justification and doubt, but bedrock convictions are not. I have the conviction that I have hands (shown in my actions), and this conviction expresses another use (another language game) of the concept true that is foundational to our systems of epistemology and doubt. The truth of bedrock convictions is a pragmatic and necessary one. They are structural.