the counter arguement

the rebutle to the x and y thing, you see my friend an occurence of an X in terms of causality necessarily corresponds to an effect Y. This IS what causality is all about if not and if one X can have multiple occuring Y's and one Y can have multiple X's causing it then what is the difference of this scenario from an independently occuring X and an independently occuring Y happening after X? could it be said that this is indeed causality? This is exactly what it means when I say everything happens by chance.