A chara, – I note with some amusement Calum Proctor's letter (March 9th) regarding the defeat of Conor McGregor by Nate Diaz. In the world of science and medicine, it's very important to note that there is a world of difference between correlation and causation. Mr Proctor might do well to consider this before attributing the success of Nate Diaz to a herbivorous diet. – Is mise
Dr DÁIBHÉAD Ó DORÁIN,
Portmarnock,
Co Dublin.