Rewrite no simulator warning - RE:Overlap of generative and non-generative metrics with machine learning

[namrathaurs]

When running the following line from the DeepDiagnostics example notebook:

! diagnose --model_path ../resources/savedmodels/sbi/sbi_linear_from_data.pkl --data_path ../resources/saveddata/data_validation.h5  --plots CoverageFraction

the output reads: "Simulator not loaded. Can only run non-generative metrics.”

When it comes to generative vs. non-generative metrics, do these categories of metrics overlap with the metrics we might know/be familiar from traditional machine learning (ML)? Or, are these metrics more aligned with astrophysics data/domain which could mean they are different than what an individual already knows with respect to metrics in ML?

[voetberg]

"Generative" is sort of an overloaded term here, it just means "runs over the simulation again" They should have very similar meanings to more common ML metrics

[bnord]

online vs. offline