Your friend saw this resource on bethinking.org and thought you should see it:
Impossible and Unproven: How can you prove Jesus rose again?
Adrian Holloway examines the question of how sure we can be that Jesus really rose from the dead.
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/did-jesus-rise-from-the-dead/impossible-and-unproven
---
bethinking.org is a collection of resources which aims to make sense of the big questions of life about God, Jesus and Christianity.