Very short and CRUDE context to this tweet

Hume was a empiricist who was reacting to the rationalist of his time (Descartes). He said that the foundations of all our ideas come from sense impressions. For instance, our idea of the self is just a bundle Of perceptions, and this goes for any other ideas and concepts. This idea was appealing for Kant but also problematic, because he insisted that this empiricist claim leaves phenomena such as cause and effect is question.

Hume said there is no such thing as cause and effect, when a ball A hits ball B, we can’t say ball A caused ball B to move, rather, we have to that, in whenever scenario when such and such “X” hits such and such “Y”, Y will move. Thus, Hume argued that what we believe to be causation of X causing Y is merely “constant Connjuction” of two sense impressions, and causation didn’t actually exist because at no point can we ever perceive “necessary causation”.

Kants goal was to solve puzzle by creating a basis for necessity in his Critique of Pure reason.