“Can you live your life 100% guided by reason?”
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With an account, you can revise, criticize, and comment on ideas.Living according to reason and rationality alone is impossible, because propositional knowledge is only a subset of needed knowledge for an embodied agent (the others being procedural, participatory- and perspectival knowledge)
It sounds like you have a different conception of knowledge and rationality from Popper’s/Deutsch’s.
There’s a unity of knowledge. Knowledge isn’t fragmented the way you suggest. Rationality means finding common preferences among ideas, ie making different types of ideas jibe. Why should that not be possible for the types of knowledge you mention?
The act of making different types of idea jibe (propositional ideas, feelings etc.), doesn’t seem to me to be best explained as a rational process. They don’t have a shared metric or inter-translatability that would enable comparison. If feelings and other non-rational mental contents cannot be reduced to explicit reasons, then the process of integrating them cannot itself be arrived at through reasoning alone. This doesn’t mean reason cannot critique feelings or other non-rational content, only that the integrative process itself operates differently than rational deliberation.
…rational deliberation.
Rationality isn’t the same as deliberation. Deliberation can be part of a rational process but it’s not synonymous with it.