Test Word Choice: The Impact of [But] vs [And]

QUESTION 1: What effect does the word "but" have in a conversation?

A message of resignation and limitation, presenting fear as an insurmountable obstacle
A message that invites us to search for solutions to manage fear
A description of two facts that coexist without canceling each other out
A declaration that the desire to travel is stronger than the fear

Because it allows you to reject an idea without the other person realizing it
Because it validates the original idea and presents the suggestion as an addition that strengthens it
Because it softens the criticism so much that it loses all its effect
Because it is a more direct and aggressive way of giving feedback