@StarTrekAngel
The overlap definition from the WT is in two parts:
1. Those who were baptised and anointed, and who's lives intersected with the 1914 date.
2. Those who were baptised and anointed, and who's lives intersected with the earlier group.
If you were born in the 1830's, baptised and anointed, and lived to see 1914 (say, 80ish years old) you are in the first group.
If you were born in 1890's, baptised and anointed before 1914 and lived to see the 1970's (80ish years old) you are in the first group.
Therefore the first group extends from the 1830's to the 1970's - 140 years.
This is only the first half of the 'overlap'.
If you were born in the 1950's, baptised and anointed before all of group one died out in the 1970's and lived to see the 2030's (80ish years old), you are one of the overlappers.
Therefore the entire overlapping generation potentially extends from the 1830's to the 2030's - 200 years.
A 200 year generation.
Let's see what Jesus was recorded as saying:
Matthew 24:34 "Truly I say to you that this generation will by no means pass away until all these things happen."
So the quotes from various scriptures enlarging on 'generation' are not really to do with assigning a specific amount of time, but simply show the absurdity of claiming three overlapping life spans totalling 200 years is what Jesus 'evidently meant'.