This is why you should always be on the lookout for possible clues. (articles.mercola.com)
In the womb, boys produce twice as much testosterone as girls, providing possible clues as to why autism strikes males in such disproportionate numbers. (discovermagazine.com)
It is obvious that fans of the series want the studio to release another installment, but the only possible clue is the developer's recent post. (gamenguide.com)