Who says I am unwilling to discuss? Let's discuss it. You seem to be trying to make an argument in silence to try and claim that the Sabbath was now kept after the fall of mankind until God's 10 commandments were given in Exodus 20 right after the children of ISRAEL left Egypt? Now I will discuss this with you dear friend but if I am able to show scripture here what will become of your argument in silence and why does it matter even if you claim Gods' people did not keep God's laws before Exodus 20 when God gave his law at Exodus 20. The fact remains God's law was given and it is the 10 commandments in the new covenant scriptures that give us the knowledge of what sin is today according to Romans 3:20; Romans 7:7; 1 John 3:4 and if we break anyone of them we stand guilty before God of sin according to James 2:10-11. So your claim here is a mute point. That said I still want to challenge your claims with the scriptures.
Before the written Word of God given at Mt Sinai in Exodus 20:1-11. God's people all through time we are taught from Torah had the "spoken" Word of God. In the spoken Word of God we can see that Gods' people had a knowledge of what sin was and also knew about the old covenant laws for remission of sins and animal sacrifices that pointed to Jesus as Gods' sacrifice for the sins of the world *John 1:29. For example we read of Abraham in Genesis 26:5 Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws. The Hebrew words used in this scripture for law is תֹּורָה (tôwrâh). The scripture is stating that Abraham had God's laws and followed them. This is further seen when Abraham went to offer Isaac his only son as a burnt offering symbolizing the offering that God would make in sending his only begotten Son for the sins of the world to redeem fallen man *John 3:16. God we know stopped Abraham and provided His own burn't offering for atonement. So God's people had and kept God's laws before Exodus 20. Further evidence of this is seen as God's people already knew about the Sabbath before it was given in Exodus 20 back in Exodus 16.
Before the written Word of God was the Spoken Word of God. Before sin, man walked and talked with God face to face and was in perfect harmony with God (Genesis 1:28-31; Genesis 2:15-17; Genesis 3:8-22; Genesis 3:1-3; 9; 11-19 8:15; 9:8; 24:7; 31:11 etc). Nowhere in scriptures is there any hint that God's people before MOSES did not know about of keep God's Sabbath or any one of Gods’ 10 commandments as already shown in Genesis 26:5 and Exodus 16.
We can keep going through the scriptures. We know that according to the scriptures sin is the transgression of God's law and through the law is the knowledge of what sin is *Romans 3:20; Romans 7:7; 1 John 3:4. So in order to know what sin is those who sinned must have a knowledge of what God's law is. Yet we see God's people before Moses knew what sin was according to the scriptures....
God said in
Genesis 4:7 to Cain when he was angry because he did not worship God in his appointed way that by doing this it was
sin. Jesus says the same in
Matthew 15:3-9 that if we follow and teachings of men that break the commandments of God we are not following God. Mankind was destroyed by a flood because of
sin (
Genesis 6:5-7). Sodom and Gomorrah was destroyed because of
sin (
Genesis 18:20). Jacob knew about
sin (breaking God's LAW) before Mt Sinai when he complained to Laben when he left with his daughters (
Genesis 31:36).
When Potiphar’s wife came to Joseph with the aim of
committing adultery, Joseph knew it was
sin and protested saying how then can I do this great wickedness, and
sin against God? (
Genesis 39:9).
As time goes by God destroys mankind for evil and
sin with a flood as well as Sodom and Gommorah with fire and the Epyptians with plagues *Genesis 6:5-13; Genesis 13:10-13; 18:20-33; 19:24; Exodus 9:13-14. If there was no knowledge of
sin there would be no punishment for it. God’s WORD is very clear that all of God’s Commandments were kept by God’s people
before the written WORD through the Spoken WORD of GOD.
As shown above God's Word (not mine) disagrees with your argument of silence which is simply not an argument at all. Now what is it you disagree with?
Hope this is helpful.