A word they are re-defining to fit their new definition of 'this generation' is 'contemporary'. Look it up in any dictionary.
http://www.thefreedictionary.com/contemporary
There is nothing about this word that suggests a mere overlap. The kids you went to school with are your contemporaries, not your teachers, headmasters, grandparents, greatgrandparents, greatgrandchildren, etc..
Make your Dubs take a position, then look up the word and get them to explain it to you.
You always have to get your Dub to take a position before you ask them any awkward question. They will deny a whole raft of embarrassing doctrines and attitudes if they know what you are targetting, so steal their opportunity to do that before you ask your question.
... and don't forget to smile and look like a potential convert or lost sheep while you do it.