Human understanding again? So if your mil was born in 1948 did her generation end with the birth of her first offspring? Can there not be concurrent generations alive at the same time. You yourself said there were four generations that will sit together. It’s evident that the generation of your mother in law didn’t end with the birth of her first offspring. Or did her generation end and she became part of the generation of her offspring.
The length of you mil’s generation is from the time she is born until the time she dies. Scripture clearly defines the average length of a generation as 70 years as I have previously shown FROM SCRIPTURE.
It's a vocabulary question.
But suppose you are right, If concurrent generations are alive at the same time by your usage,which you claim to be Biblical, though I surely don't see the word generation in your quote, then how do you know that the Bible is counting them "end-to-end" so to speak? Where, in so many words, does it say that?
It seems to me you make no distinction between "generation" and "lifetime."
To put it another way, here is what you say, with stresses added:
Psalm 90:10 The years of our lives are 70; and if by reason of strength they be 80 years, yet most of them are labor and sorrow; for life is soon cut off and we fly away.The word generation does not appear in what you quote from Psalm 90. I see no definition of generation. Where exactly is the definition? I see "years of our lives" but the activity of "generation" takes place toward the earlier portion of the "three score and ten years mentioned in Psalm 90. I have never heard it suggested that "lifespan" and "generation" were synonyms in or out of the Bible. Where are they explicitly put forth as synonyms?Matthew 1:17 Therefore all the generations from Abraham down to David are 14 generations; and from David down to the Babylonian captivity are 14 generations; and from the Babylonian captivity down to the anointed, are 14 generations.
Matthew is using the Psalm 90 definitions of Generation in order to tell a specific chronological time story. The first interval of that story is strictly historical, the interval from Abraham to David.
I THINK, I could be wrong, that you are assuming what you attempt to prove.
My mother-in-law was born in 1931 but my generation does not have to wait until her death to begin.