Barnier also appeared to suggest that Labour leader Jeremy Corbyn's proposal for a UK - EU customs union could be key to solving the problem of the Irish border. (theguardian.com)
Moreover, the chapters build on each other; «mental time travel,» or the ability to distinguish between the present and the future, is key to solving problems with multiple steps. (booklistonline.com)
Musk thinks it just might be the key to solving the problem of global warming. (fastcompany.com)