Oxford languages (or really just after googling) says “rational” is “based on or in accordance with reason or logic.”
I think there are a lot of other types of definitions (I think lesswrong mentioned it is related to the process of finding truth). For me, first of all it is useful to break this down into two parts: 1) observation and information analysis, and 2) decision making.
For 1): Truth, but also particularly causality finding. (Very close to the first one you bolded, and I somehow feel many other ones are just derived from this one. I added causality because many true observations are not really causality).
For 2): My controversial opinion is everyone are probably/usually “rationalists”—just sometimes the reasonings are conscious, and other times they are sub/un-conscious. These reasonings/preferences are unique to each person. It would be dangerous in my opinion if someone try to practice “rationality” based on external reasonings/preferences, or reasonings/preferences that are only recognized by the person’s conscious mind (even if a preference is short term). I think a useful practice is to 1. notice what one intuitively want to do vs. what one think they should do (or multiple options they are considering), 2. ask why there is the discrepancy, 3. at least surface the unconscious reasoning, and 4. weigh things (the potential reasonings that leads to conflicting results) out.
Oxford languages (or really just after googling) says “rational” is “based on or in accordance with reason or logic.”
I think there are a lot of other types of definitions (I think lesswrong mentioned it is related to the process of finding truth). For me, first of all it is useful to break this down into two parts: 1) observation and information analysis, and 2) decision making.
For 1): Truth, but also particularly causality finding. (Very close to the first one you bolded, and I somehow feel many other ones are just derived from this one. I added causality because many true observations are not really causality).
For 2): My controversial opinion is everyone are probably/usually “rationalists”—just sometimes the reasonings are conscious, and other times they are sub/un-conscious. These reasonings/preferences are unique to each person. It would be dangerous in my opinion if someone try to practice “rationality” based on external reasonings/preferences, or reasonings/preferences that are only recognized by the person’s conscious mind (even if a preference is short term). I think a useful practice is to 1. notice what one intuitively want to do vs. what one think they should do (or multiple options they are considering), 2. ask why there is the discrepancy, 3. at least surface the unconscious reasoning, and 4. weigh things (the potential reasonings that leads to conflicting results) out.