Home purchases that are very highly leveraged or unaffordable subject the borrower and lender to a great deal of risk. Moreover, even in a strong economy, unforeseen life events and risks in local real estate markets make highly leveraged borrowers vulnerable.

We humans are great at creating tools with unforeseen consequences. For instance, when we invented the wheel, we had no way of knowing we were also laying the foundations for the TV show 'Top Gear.'

Prisoners have benefited disproportionately from 'rights inflation' - the expansion of human rights into unforeseen nooks and crannies.

What is certain about the future is that even the best efforts to predict the conditions of future war will prove erroneous. What is important, however, is to not be so far off the mark that visions of the future run counter to the very nature of war and render American forces unable to adapt to unforeseen challenges.

To be clear, geoengineering won't solve global warming. It's not a 'techno-fix.' It would be enormously risky and almost certainly lead to troubling unforeseen consequences.

Technology sometimes gets a bad rap because of certain consequences that it's had on the environment and unforeseen problems, but we shouldn't use it as an excuse to reject our tools; rather, we should decide that we need to make better tools to solve the problems caused by the initial tools in a progressive wave of innovation.

Unforeseen surprises are the rule in science, not the exception. Remember: Stuff happens.

It looks like caring for the most vulnerable in our society could be yet another casualty of Brexit, with over-stretched and potentially unsafe care services and a reduction in female employment another unforeseen consequence.

Technology is, in many respects, an enabler for an open, transparent society. But it's also an enabler for supervision to a completely unforeseen degree. And for commercialising personal space to an unforeseen degree.