Leviticus 11 - 12
God provides clear instruction on the distinction between what is clean versus unclean. All of living creation falls into one of these two classifications, which even Noah understood in the times prior to the flood.
God shows Himself to be very binary in all that He has created, and even today there are only two kinds of people in the world - those who belong to Him, and those who don’t.
There is no in-between.