I wish some journalist would ask Donald Trump: “Mr President, if America were invaded, which states would you surrender to achieve peace?” Of course, their organisation would be barred from all subsequent press conferences, but it would be worth it (Zelenskyy says Ukraine cannot accept US recognition of Crimea as Russian, 24 April).
John Illingworth
Bradford
• The elephant in the room here is that all IQ tests are historically, socially and culturally specific, and hence inevitably reproduce the inequalities embodied in their moment of origin (Maga’s sinister obsession with IQ is leading us towards an inhuman future, 28 April).
Prof Anthea Callen
Leamington Spa, Warwickshire
• Anyone who goes walking in the west of Scotland from June to September will have suspicions about the decline of bugs (Report, 30 April). Maybe the midges still have free rein there because nobody goes spreading pesticide on the mountains, bogs and moors.
Margaret Squires
St Andrews, Fife
• The only way to eat chocolate digestives (Letters, 28 April) is to buy a packet of the dark chocolate ones. Half a pack got me through plenty of tricky assignments for my Open University degree. I never noticed which way up they were.
Christine Walters
Buxton, Derbyshire
• News of the salutary effect of champagne is welcome (Drinking champagne could reduce risk of sudden cardiac arrest, study suggests, 29 April). When will Dom Pérignon become available on prescription?
James Fanning
Greifswald, Germany
• Do you have a photograph you’d like to share with Guardian readers? If so, please click here to upload it. A selection will be published in our Readers’ best photographs galleries and in the print edition on Saturdays.
