I'm working on a conlang (constructed language) and would like some input from the Less Wrong community. One of the goals is to investigate the old Sapir-Whorf hypothesis regarding language affecting cognition. Does anyone here have any ideas regarding linguistic mechanisms that would encourage more rational thinking, apart from those that are present in the oft-discussed conlangs e-prime, loglan, and its offshoot lojban? Or perhaps mechanisms that are used in one of those conlangs, but might be buried too deeply for a person such as myself, who only has superficial knowledge about them, to have recognized? Any input is welcomed, from other conlangs to crazy ideas.
When speaking about radical honesty I used "can say" because you nothing in radical honesty forces you to use evidentials.
As far as my wish for an ideal language goes I think it's good if the language requires evidentials. When it comes to "I conclude that my car is running out of gas" it's useful to distinguish the fact that you conclude based on reason, your intuition or because an authority told you so.
"You are my friend" can also mean many things. You can say it to mean: "I hereby declare that you are my friend". You can mean "my intuition tells me your my friend. You can mean "based on reasoning I conclude that you are my friend". You can mean "I hereby promise you that I will treat you as a friend in the future". The fact that English often leaves that unspecified can lead to a lot of misunderstandings.
"You are angry" can also mean similar things (based on reasoning I conclude that you are angry, I promise that I am treating you as though you are angry, etc.) So that doesn't really answer the question of whether the language is consistent on this between "you are angry" and "you are my friend".