“Was it hard to concentrate during that long meeting? Does the crossword seem a little tougher? You could be mildly dehydrated.A growing body of evidence finds that being just a little dehydrated is tied to a range of subtle effects — from mood changes to muddled thinking.”
Click Mental Performance Can Be Hurt By Even Mild Dehydration : Shots – Health News : NPR for the rest of the article.
Spiritual Wrestlings 