Now if you were asked by someone to identify a scripture that tells us what a generation is, what scripture would you turn to? I'll give you a moment. Think about that.
My choice is Exodus 1:6. Let's read that. Exodus 1:6.
The implication in this statement is that there are other scriptures to justify the broadening of a generation. If there were he should probably have use them, because expanding a generation based upon a set of brothers to include multiple generations just does not make sense.