Sandemanianism refers primarily to an aspect of theology regarding the nature of faith promoted by Robert Sandeman (1718-1781), from which it derives its name, and his father-in-law John Glas (1695-1773) in Scotland and England during the mid 18th century.
To the Sandemanians, the nature of saving faith reduces to mere intellectual assent to a fact or proposition. This is illustrated rather clearly in the following quote. "In a series of letters to James Hervey, the author of Theron and Aspasia, he [Sandeman] maintained that justifying faith is a simple assent to the divine testimony concerning Jesus Christ, differing in no way in its character from belief in any ordinary testimony."^^
- ? Encyclopædia Britannica Eleventh Edition (1911), now in the public domain; s.v. Glasites, or Sandemanians, bracket added.