Columnist: Taking a strong position on an issue makes one likely to misinterpret or ignore additional evidence that conflicts with one' s stand  But in order to understand an issue fully, it is essential to consider such evidence impartially
Thus, it is best not to take a strong position on an issue unless one has already considered all important evidence conflicting with that position
To ensure that one has impartially considered the evidence regarding an issue on which one has taken a strong position, one should avoid misinterpreting or ignoring evidence regarding that issue.