Here's a new find via FamilySearch's collection of Indiana Marriage Records from 1811-1959, the marriage license of my great-grandparents Edgar Lawrence Jones and Alma Oyler from Boone County, Indiana in 1916.
Source: FamilySearch, Indiana Marriage Records 1811-1959
The license was witnessed by my 2nd-great-grandfather Thomas Robert Jones and signed on 31 August 1916. The wedding occurred on 3 September 1916.
I'm glad they both answered "no" to question 27 - "Is he/she an imbecile, feeble-minded, idiotic or insane or is he/she under guardianship as a person of unsound mind?"