the mind > mental capacity > knowledge > conformity with what is known, truth > deceit, deception, trickery > cheating, fraud > duping, making a fool of > [noun] > gullibility
cheatableness1657
cullibility1728
dupery1759
gullibility1793
dupism1798
humbuggability1798
gullability1822
gullableness1830
dupability1841
pluckability1841
dupedom1843
1843 T. CarlylePast & Presentiv. i. 322 Imbecile Dupedom.