Splane quotes Scripture to get some bearing on a Biblical definition of "generation":
Exodus 1:6) "Joseph eventually died, and also all his brothers and all that generation."
He later states:
"Suppose there was a man who died 10 minutes before Joseph was born. Would he be part of Joseph's generation? No. Because he had never lived at the same time as Joseph, he was not a contemporary of Joseph's. Now suppose there was a little baby who was born 10 minutes after Joseph died. Would the baby be part of Joseph's generation? Again, no. Because the baby would not have lived at the same time as Joseph." - JW Broadcast 9/2015, 00:04:00+
So, after citing a scripture that establishes that all of Joseph's brothers - living or dead - comprise the same generation, he creates an example of a man dying 10 minutes before Joseph was born as not being part of Joseph's generation, contradicting the scripture he quoted (Exodus 1:6) that all Joseph's brothers - whether born before him and dying before he was born - were of the same generation.
THis underscores the madness of forcing meanings on Biblical terms for the sake of shoring up dubious dates of significance such as 1914.