the.com/duplication
Making two of something so you can blame the other one.
means The act of producing an exact copy, or having the same thing exist twice over.
from From Latin duplicare, to fold double — duo (two) plus plicare (to fold), the same plicare hiding inside complicated and reply.
BiologyGene duplication quietly fuels most evolutionary innovation.
ComputingDeduplication software exists solely to undo it.
MusicDuplets squeeze two notes into three's space.