I once had a co-worker at a small company (2 developers, me and him). In the spirit of doing less work, he proposed to me changing the meaning of "someProperty

I once had a co-worker at a small company (2 developers, me and him). In the spirit of doing less work, he proposed to me changing the meaning of "someProperty" to mean something different, without changing the name of that property. Also, it was a boolean; so he wanted true values to actually represent false, and vice versa. I politely pushed back on that one.