Why is murder wrong if Many Worlds Interpretation of Quantum Mechanics is true?

[FlatAssembler]

I am not sure what you mean.

Think of the waveform as the set of all potentialities. When that waveform collapses, all of those potentialities become a single actuality.

Boru

But if MWI is true, then waveform collapse is a subjective phenomenon. Once we observe the particle, we say the waveform has collapsed, but what has actually happened is that now we know which of the parallel worlds we are in.