In his method of apologetical verification, he used of elements of common ground as a point of contact with unbelievers.
Niko Sudibjo 2018, 'The Critiques of Francis Schaeffer's Work', Polyglot: Jurnal Ilmiahhttps://ojs.uph.edu/index.php/PJI/article/view/372. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)