#RealLife non-math example that illustrates why function composition is not commutative. #MTBoS #ITeachMath

@a_freeparticle When I was in grad school one of my housemates (a math student) was once sitting at the dinner table when he lifted the bottle of salad dressing, paused, and said: "The operations of shaking the bottle and removing the cap do not commute."

Nice 👍

Thank you! 🙂

Finally I get why a monad is not a burrito!!! It's because all this time it was actually a laundrette, and the identity function is putting dry, dirty clothes into the dryer. No wonder I didn't get Haskell sooner. Thanks for this.

depends on the property for example, if the property is colour then the output is invariant to composition.