Field IsChanged Question

I have a piece of code that relies on the IsChanged property of the field. I am wondering if there is any way to ensure the IsChanged is set to true if someone edits the field but edits it to the same value it already contains (I know this likely sounds ridiculous, but there is actually a reason for it - I may have to figure out some alternative but for now I am hoping to figure out a way to force IsChanged to be true).

In my tests so far it just consistently leaves it as false - and I have tried various approaches - but haven't hit one yet. Thanks for your thoughts and ideas in advance.