The point here is that dimensionality reduction does not need to be done by inferring higher level concepts like headlights. That there are scenarios in which humans have easy models at hand is common knowledge.<p>You can randomly throw stuff away! That&#x27;s the new thing here.<p>Of course it is a very rough setup. However that the brain performs random projections is an interesting hypothesis and they actually compared it with human subjects which is a plus.<p>Compared to model-heavy or deterministic scenarios in which there are &quot;boring&quot; dimensionality reduction techniques, random projections might also explain secondary effects, such as better resilience against overfitting.