In front of them sat experts from campaigning bodies, transport research and the police - all ready to get into a proper discussion - and yet the MPs demonstrated that they didn't even know the most basic of facts.
Evidence and statistics were bypassed in favour of opinions and anecdotes on sideline topics.
Such a clear demonstration of lack of research and understanding at this level of seniority would, in any other business, be classed as negligent.
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Donald Trump is to visit the UK on July 13 and hold bilateral talks with Theresa May, Britain's ambassador to the US has said.
The Football Association has announced it has received an offer to buy Wembley Stadium.
The most hotly-tipped date is July 13, following the Nato summit which the president is due to attend in Brussels on the previous days.