*** it-1 p. 28 Abraham ***Family Origin and Early History. Abraham was the tenth generation from Noah through Shem and was born 352 years after the Deluge, in 2018 B.C.E.
(Matthew 1:17) 17 All the generations, then, from Abraham until David were fourteen generations, and from David until the deportation to Babylon fourteen generations, and from the deportation to Babylon until the Christ fourteen generations.
2018 years divided by 42 generations = 48.04 years per generation according to Matthew.... a person who heard Jesus talk about "this generation"......
After Jerusalem was destroyed in 70 CE, did Matthew start thinking,"Hmmmm..... I wonder if Jesus was really thinking back to Joseph's day, maybe this isn't what he was thinking about after all, and maybe it was overlapping generations, and this "destruction" that happened with Jerusalem is wrong?"
70 CE/destruction -33 CE/ Jesus died = 37 years "This generation will not pass AWAY" .....Well, did Jerusalem pass away within 48.04 years? yes