Evidence: GLOW accessibility audit of psy101-reading-forgetting-scanned.pdf
Score: 50 out of 100. Findings: 4.
Checked by GLOW (letitglow.app), which applies the same rules every time.

CRITICAL PDF-NO-IMAGES-OF-TEXT  (1)
         This PDF appears to be entirely scanned (all 2 pages are image-only with no extractable text).  Run OCR (e.g. Adobe Acrobat 'Recognize Text', Tesseract, or ABBYY FineReader) before attempting accessibility remediation.
CRITICAL PDF-TAGGED  (1)
         PDF is not tagged; screen readers cannot determine document structure
HIGH     PDF-LANGUAGE  (1)
         PDF has no language set in document metadata
HIGH     PDF-TITLE  (1)
         PDF has no title set in document metadata

What this report cannot see: anything a person has to judge, such as
whether alt text is meaningful, whether color carries meaning, or
whether the order of information makes sense. Ask a person.