There is only a short list of assumptions you can reasonably make when conversing with another. 1. That they are telling the truth and/or lying. 2. That they think and/or believe that they are telling the truth and/or lying. 3. That they are partly telling the truth and lying on purpose and/or accident. 4. That any truth or lie can be isolated & exposed over time through prolonged interaction with them & life in general. 5. That positivity and/or negativity are interfering & affecting delivery too much or not enough. 6. Any combination of these assumptions. 7. This list is open for anyone to try to add to it.
I don’t disagree with anything on your list
As I read it, my gut tells me to think in terms of the humane and inhumane. People can converse with humane intentions, or people can converse without humane intentions.
I prefer to believe the former happens more frequently than the latter