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Do you know what the Torah is?
The Law?
Torah Law?
The Law of Moses?
The Mosaic Law?
New Covenant Law?
The Law of Christ?
God's Instruction.
The Word of God.
God's Commands.
His Commandments.
What is old testament law?
Are you saying law being old testament?
Of course a person can learn about what the law was. If the testament or covenant is or was old. Otherwise something like "the Law was not abolished" must be maintained and taught if true.
It is the Law and the Prophets that Jesus did not come to abolish.
For there to be old covenant law there has to be an old covenant. For this to occur there had to have first been a covenant that was later called old. A first covenant is different from an old covenant.
Now I need to understand the TaNaK. I have read and accepted the Torah.