Theresa May has told MPs attempting to delay Brexit that it would not "solve the situation".
"The decision remains the same - the deal, no-deal or no Brexit," she said at Prime Minister's Questions.
Labour leader Jeremy Corbyn accused her of having a "closed mind" to other Brexit options, such as Labour's plan for a customs union with the EU.
But the PM attacked him for refusing to meet her and said he did not "have a clue" what his own policy meant.
Meanwhile, leading Tory Brexiteer Jacob Rees-Mogg said "any deal would be better than not leaving at all".