hard food goes soft when stale soft foods get hard

[okz]

So why do hard food like cookies get soft when they go stale but soft foods like bread get hard? How do they know?

[demanton]

They worked it out in a court case and it is now codified in British law:

www.vatcalculator.com/news/the-curious-case-of-the-jaffa-cake

And sorry about the language, but Jaffa Cakes are f'in' good:

[ayekantspeylgud]

That's an interesting point you bring up... Though it mostly seems to go one way to me (soft foods get hard, hard foods just get crumbly & gross)... My cookies are usually soft and turn hard so I guess you must mean something like Chips Ahoy or a different type of cookie.