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## Homework Statement

I was trying to work through some quantum physics questions and I was getting a bit confused. I know that for fermions the wavefunction must consist of spin and spatial parts of the fermionic wavefunction with opposite exchange symmetry (ie antisymmetric spin and symmetric spatial or antisymmetric spatial and symmetric spin) but I am a bit confused where the inital idea for the need for a overall antisymmetric wavefunction came from???

thanks