I think this cat has got waaaay too broad a definition of rancidity. Because, anybody who's ever sniffed something rancid knows it. This is not a "my palate is not sensitive enough to notice it" type of deal.

(I store my oils in glass jars next to the stove too, and I can smell and taste the difference. I am just old enough to remember when you had to drain cooking fat into an old pickle jar till the jar was full, and then throw it out, so that the fat didn't get into your septic and screw up... something. A pickle jar full of month-old cooked fat? That is rancid.)

I mean, clearly she also doesn't know the definition of the word "cunt" either, so I shouldn't be surprised.