[hprotagonist]

"in theory, there's no difference between theory and practice. "

[drfuchs]

... but in practice, there is. - Jan van de Snepscheut

[mirimir]

But in practice, theories are only hypotheses, which at best can just be falsified ;)

[hprotagonist]

possibly misattrubited. https://en.m.wikiquote.org/wiki/Jan_L._A._van_de_Snepscheut