Professor Yoshino explains. "Shakespeare calls this a problem of ocular proof, the idea that we need to see evidence before we believe in it -- and that,oftentimes, when metaphysical questions of guilt or innocence are difficult for us to answer, we have a tendency to reduce them to questions that pertain to physical evidence.

VOA: special.2011.06.06

Obviously we think that debate is healthy. We're going to help the foreign minister answer the questions that have been raised in this debate.

VOA: standard.2009.10.13