From the wiki link you provided, here are examples of where the law applies:
"Is This the True Face of Britain's Young? (Sensible reader: No.) Have We Found the Cure for AIDS? (No; or you wouldn't have put the question mark in.) Does This Map Provide the Key for Peace? (Probably not.)"
From the Washington Post: Does sister need to know her abusive husband is why they stay away? Do landlords have to provide AC? Is your lamp the right size?
The law also doesn't seem to work quite as well when the verb is a modal (e.g. should, can, could, ...).