Great - so you've got some stuff to buff your die rolls. But - what die roll is going to make your deductions for you?
I know that the dents on the cane are from a dog, and specifically what kind of dog. I "remember" that Joe had that kind of dog and that he smoked a specific type of cigar that I can get a whiff of using my superior perception. The pieces are more clearly laid out for me and I should have more hints and clues than most other PCs or at least I should be the one responsible for getting those hints and clues.
Obviously we can never build a game that's going to turn your average Joe into a world class detective. I just think we could come close.