> Is there any harm in printing SP (and the other point groups) by default?  
> Are we worried that it will break other SMILES parsers?

That would be my worry. That we'd print SP or TB or whatever, and users would 
come back and complain it's not valid SMILES using Open Eye or ChemDraw or 
somesuch. That's why I suggested making it optional.

If you'd prefer to recommend the opposite (i.e., it's an option to turn it 
off), I'm open to opinions.

>> And I'd start with 2.3.0 only giving SP stereo if 3D coordinates are present.
> ... or if the input was SMILES with SP specified!

Exactly.

-Geoff
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