It's been less than a week since British voters declared their desire to part ways with the European Union. But reports of "buyers' remorse" from both prominent and everyday Leave voters have already made headlines. A petition calling for a second referendum has gathered over 3.5 million signatures. One poll found 7.1 percent of pro-Brexit voters expressed regret over their decision; in fact 54 percent of "Leave" voters had expected to lose. Which raises the question: Are there really, as John Oliver put it, "no f---ing do-overs?" Or could Britain rethink this? Well, as Labour Party member and Member of Parliament David Lammy noted, "the referendum was was an advisory, non-binding referendum." To actually go through with the Brexit, Parliament must dissolve a number of national laws binding Britain to the EU and it must invoke Article 50 — the piece of EU legislation that kickstarts the separation process.