✓ Determine the author's handwriting, signature, or seal
✓ Anachronism or inconsistencies in writing style (grammar, idioms, punctuation, orthography)
✓ Anachronism or inconsistencies in refence to events
✓ Provenance or origin of the document
✓ Semantics (meanings of words)
✓ Hermeneutics, clearness in meaning or ambiguity