A month before the Brexit vote, the Ipsos Mori polling firm discovered that the British public was systematically misinformed. For instance, Leave voters believed that EU immigrants comprise 20 per cent of the UK’s population. Remain voters estimated 10 per cent. The truth is about 5 per cent. Both Leave and Remain voters vastly overestimated what percent of the UK child benefit goes to children living in Europe. Both vastly underestimated how much foreign investment comes from the EU, and overestimated how much comes from China.