Talk:surely

Southern U.S. yes: used to show ready agreement
According to the Microsoft® Encarta® 2009,

Southern U.S. yes: used to show ready agreement --Backinstadiums (talk) 15:10, 19 July 2019 (UTC)

no deontic use
The Cambridge Grammar of the English Language, page 182, reads

The future + epistemic combination is more likely in conjunction with harmonic surely (which is not used deontically): It must surely rain soon --Backinstadiums (talk) 15:30, 18 October 2019 (UTC)