Question: Why would Ben/Riley/Abigail need to go all the way to Philadelphia to see the Silence Dogood letters? Surely they would have been available online in 2004 when this movie was made? Ian found info on "Pass and Stow" online. (01:07:05 - 01:14:05)
History_Movie_Nerd
4th Aug 2019
Answer: In reality, they wouldn't...the only reason they go to Philadelphia is to advance the plot. This has been discussed by numerous critics and can be classified as a mistake (either a "Deliberate Mistake", or character stupidity).
The glasses! And of course one can presume the didn't know specifically what they where looking for.