If you're playing a game in which the gameplay is about mysteries, then its only fair to let you actually engage fully with the game, even if your character wouldn't be that great at it. Few people insist that someone playing an Int 8 character should do tactically dumb things, because usually the tactics of combats is a big part of the 'game' - the stuff meant for the players - in an RPG.

However, if the numbers bother you or someone at the table, I'd suggest just asking permission to take a Knowledge or Profession(Detective) skill whose only function will be to justify your OOC aptitude. Skill ranks are dominant over mental stats for things that fall within the purview of skill checks, so mechanically one should not be surprised if the Wis 6 guy with 20 ranks of Profession(Detective) is a better detective than the Wis 20 cleric with no actual training in it.