Did Martin Luther believe in double predestination?
*He believed in double secret predestination
"All things whatever arise from, and depend on, the divine appointment; whereby it was foreordained who should receive the word of life, and who should disbelieve it; who should be delivered from their sins, and who should be hardened in them; and who should be justified and who should be condemned." - Martin Luther
Seems pretty clear where Luther stood on Predestination.