Credit goes to AltHype. --- Sources ---- Study on Health Science Knowledge Retention: http://www.heqco.ca/SiteCollectionDocuments/How%20Much%20Do%20Students%20Remember%20Over%20Time.pdf Study on Consumer Behavior Class Knowledge Retention: http://www.uky.edu/~kdbrad2/EPE773R/StudentPapers/ConsumerBehavior.pdf Canadian Memorial Chiropractic College Knowledge Retention Study: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1924649/ Knowledge Loss of First Year Science Students in Saskatchewan: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1397826/ Knowledge Decay in Economics Students: http://sci-hub.tw/10.2307/1182376 Cognitive Ability by Credential Level: https://thealternativehypothesis.org/index.php/2016/12/04/blacks-and-whites-with-equal-educational-attainment-differ-in-cognitive-ability/ Meta-Analysis of Old Studies on Retention of Basic Scientific Knowledge: http://sci-hub.tw/10.1007/s10459-008-9101-y University of Colorado Retention Study: https://www.cs.colorado.edu/~mozer/Research/Selected%20Publications/reprints/LindseyShroyerPashlerMozer2014.pdf Average Age of Doctorates: https://wayback.archive-it.org/5902/20160210153659/http://www.nsf.gov/statistics/infbrief/nsf06312/ Meta-Analysis on Statistical Prediction Rules: http://sci-hub.tw/10.1037/1040-3590.12.1.19 IQ Decline in the US: https://sci-hub.se/10.1016/j.paid.2015.12.035 Papers on Academic Mobbing: http://sci-hub.tw/10.2753/ATP1084-1806320103 http://sci-hub.se/10.1080/13594320801969707 http://sci-hub.se/10.1007/s10672-012-9193-7 Hoel and Cooper 2000: https://pdfs.semanticscholar.org/8321/ffcc35416b266ccd84e0da63fb3348bfb5ac.pdf

Credit goes to History of Philosophy.

Credit goes to Harvest Rain.