I have been thinking that sometimes personalities of the speaker
affects the way I perceive his ideas. i.e. if the speaker has a
pleasant personality, and presents his ideas with a calm demur, I will
be more agreeable with his point of view and I will take in his
evidence with an open mind. However, if the speaker is unpleasant or
if he is not calm and confident while presenting his ideas, I
sometimes dismiss his ideas and evidence as unworthy of my attention.
I think I might have found a workaround for this issue. Whenever I
find myself strongly agreeing or strongly disagreeing with someone's
ideas, I would do a "vice-versa" on the speaker's personality and see
if I still agree with the evidence. What this means is, if I find
myself strongly agreeing with someone, I will imagine him presenting
his facts and ideas at the top of his voice or in a very shaky voice.
Similarly, if I find myself strongly disagreeing with someone's ideas,
I will imagine him talking in a calm manner and in a strong voice.
The idea here is to try and subtract out the effect of personalities
when listening to new theories and ideas.