If ADAM had not SINNED, WOULD HE STILL BE ALIVE TODAY?

Adam was created perfect, a 1.0000 but when he sinned he became a .9999999999 imperfect but close, thats why the preflood generation lived so long, but when you multiply a fraction times a fraction you get a smaller fraction. wasn't known at that time, in fact Abraham was married to his sister, but when God gave the law to Moses, then it became wrong, & through ths we now view it as repugnant.