In the ancient texts it’s called Dravya Guna Sambandha, the relation between a substance and its quality. It is through the quality only that you identify a substance.
Sugar powder and salt powder they both look like, it is only through the taste that you know whether it is sugar or salt; through the sweetness or the saltiness.
I know many times many women in their blissful state or in their worried state put salt in the pudding. Honestly tell me, how many of you have done this before? (Many raise their hands)
It is milk pudding and it tastes very salty.
So, it is the quality in a substance that makes that substance. They are related very closely.