Bobby...
I'm am a generation, my parents are another generation and my children are yet another generation. We are all contemporaries. Two different words conveying two different meanings.
If someone told my parents that their generation would not pass away I would be expecting the end anytime now.
If someone said my generation would not pass away I'd expect the end to come in a few decades at the most.
And if someone said my children's generation would not pass away...
However what has happened is they are now saying that all contemporaries of my grandparents will not pass away...
This is not scriptural and yes you do need to take note of definitions of words and the correct usage of such.