I’m convinced anyone who claims they’re undecided is just being polite to the pollster instead of telling them “none of your business”. Or “undecided” is some statistical construct based on the last 70 years of data. Or, someone who hasn’t been paying attention and doesn’t want to admit to their own apathy.
The idea that someone has thoroughly weighed the offerings and is still waiting for more information to make a decision is utter fucking nonsense.