My younger son is four now. For years he and his brother have played games involving their imaginations. Sometimes it's annoying because they take things that are mine and repurpose them to be robot deodorant or whatever. But it's also hilarious to listen to them argue about.
When my younger son was 2, he would argue back at his brother that something imaginary had not broken.
"NO! FIX FIX!" and he'd wave his hand over whatever thing that doesn't actually exist and 'fix' it. They'd argue about whether it was broken or fixed and sometimes wrestling ensued.
Last night, I heard the progress of language as both boys agreed "Correct, correct!"