Location would be at NUS, super exciting project dealing with amons and defects! Please get in touch with Stephen and myself if interested, or retweet!

Thanks, Jean-Philip!

😀 yes, but maybe it's already unique with even fewer properties?

Thanks, do you know of any studies that have already assessed their effectiveness? And should we be devising drugs that inhibit glutamine synthesis in the body?

fully agreed, in order to mimic multiple properties _and_ size (or weight) the likelihood for another system to match water would be zero. My question would be: How many (and which) properties does it take?

4/n One could certainly argue that all compounds are represented as discrete and distinct points in Hilbert space. Unfortunately, I have no idea what this implies in terms of philosophy! But maybe you can help, or some philosopher on bsky.social who's interested in this ...

3/n the nature of the property also matters: Is it a scalar, a tensor, or a field? The electron charge density for example is, by virtue of Hohenberg Kohn, in a unique 1-to-1 relationship with Psi, thereby implying that no other compound B will exhibit the same electron density as compound A.

2/n This is not uncommon, the energy for example (O_1 = H), is often (near-)degenerate in chemical space. However, afaik the likelihood for this to happen for one, or n, properties, is neither understood nor studied enough. I'd guess it decays rapidly with n even for generous error margins ...

1/n Within some error margin, two compounds A and B can, by coincidence, exhibit the same property P_1 if their QM expectation values of the operator of P_1 happens to be sufficiently close, i.e. it is not necessarily true that <Psi_A | O_1 | Psi_A> != <Psi_B | O_1 | Psi_B>.