The Sunday Times tech correspondent Danny Fortson brings on Jon Callaghan, founder of True Ventures, on investing in things before there is a market (3:15), finding Fitbit (6:00), backing big ideas (9:15), celebrating failure (16:00), a drone investment that crashed (21:00), backing Wordpress (26:00), why we're not in a bubble (27:15), turning computers on human health (32:00), why venture capital is a weird business (35:00), how money gets in the way of good ideas (39:45) and why robots are 'the next big thing' (42:15).