It is not clear that intelligence has any long-term survival value. Stephen Hawking
Reading someone else's newspaper is like sleeping with someone else's wife. Nothing seems to be precisely in the right place, and when you find what you are looking for, it is not clear then how to respond to it. Malcolm Bradbury
It is not clear why other EU member states would give Britain a better deal than they themselves enjoy. Theresa May
On reflection, it is not even clear if military power is a transitive relationship. Until we have defined more explicitly how we are going to measure military power, it is not clear that if A is more powerful than B, and B more powerful than C, that A is more powerful than C. Andrew Marshall
What leads us astray is confusing more choices with more control. Because it is not clear that the more choices you have the more in control you feel. We have more choices than we've ever had before. Sheena Iyengar