Insomnia is a big problem, for example.
A big problem, for example, is how to provide power to tiny medical robots.
Goldbach's Conjecture, a famous mathematical problem, for example, states that any even whole number is the sum of two primes.
A big problem, for example, will be what to do with the estimated 1.2m soldiers in North Korea's army.
The nexus is a recognition that any solution for one problem, for example water, must equally consider the other two in the nexus.
A current problem, for example, is what it means to be an officially British broadcaster in an era of increased independence for Scotland, Wales and Northern Ireland.
Any given problem may involve all three categories; a physiological problem, for example, will produce psychological effects, and these may result in some social maladjustment.
Among those seeking the procedure for medical reasons — to correct a breathing problem, for example — only 2 percent of patients exhibited symptoms of the disorder.
Bailey's report asks for government and business to work together to tackle the problem – for example, by ending the sale of inappropriately "sexy" clothing for young children, such as underwired bras and T-shirts with suggestive slogans.
That would be a problem, for example, for a unit deployed in the mountains of the Hindu Kush in Afghanistan in the dead of winter, unable to recharge communications batteries or warm up soldiers' uniforms.
On the other hand, a significant portion of the population has a medical problem — for example, liver or kidney disease, heart failure or salt-sensitive hypertension — for which the value of salt restriction is not disputed.
