Adventure games are known for their medium - difficult puzzles and challenges, and really making use of your thinking cap. This is why I miss them. Today's games barely pay heed to the player's intelligence and critical thinking skills, if at all. I thought Fahrenheit was really going to challenge me...but I'm sorry to say that Fahrenheit failed that aspect of the adventure game genre. It turned out to be one of the easiest games I've ever played.
Spoiler:Finding a friggin book as the game's hardest puzzle? That "puzzle" took me 5 minutes...and 2 of those minutes I spent in the bathroom. And pairing up evidence was a no brainer, ESPECIALLY when I was the one who decided which pieces of evidence would be available.