expression
I wonder about that; I'm not so sure; don't bet on it
Used to express skepticism or doubt about a statement or prediction, often with a slightly dismissive or challenging tone. Can be used in casual conversation.
「明日は晴れるよ」「それはどうかな」
"It'll be sunny tomorrow." "I wonder about that."
彼が約束を守るって？それはどうかな。
He'll keep his promise? I wouldn't bet on it.