Hearts and Minds. Ourthinking on controversial issues such as genetic cloning, the environment and animal welfare continues to be polarised between what we consider rational responses and our gut instincts. Is there such a thing as pure reason? Is emotion always irrational? When it comes to making public policy and laws, both extremes can be dangerous. Ian Hargreaves examines how we can strike the right balance. Producer Zareer Masani. Repeated Sunday 9.30pm