Sorry to disturb you. I just wanted to let you know that Paperpile in some cases does not fetch the PDFs from Google Scholar. As an example I added a reference (Hahn and Oaksford, 2007).
Thank you for your great work!
Hahn, U., & Oaksford, M. (2007). The rationality of informal argumentation: A Bayesian approach to reasoning fallacies. Psychological review, 114, 704. doi: 10.1037/0033-295X.114.3.704