Property taxes are also unpopular because they are sensitive to trends in the market, making them often unreliable.
He tries to make as much use as he can of public services, but finds them often unreliable.
But the scientists conjecture that use of sunstones may have persisted for many centuries as a back-up to the often unreliable magnetic compass, which was introduced in Europe in the 13th Century.
None of these alternatives appeal to farmers as much as SAWS. British workers are often unreliable: many participants in a trial scheme for the local unemployed in Angus, Scotland, quit after a week, complaining that berry-picking was not for them.
"The records from earlier periods are often unreliable so we can't be entirely sure but there have been people living into their 80s and 90s since at least the Greek civilisation, " says Professor Tom Kirkwood, an authority on genetics and ageing.
Even with advances in GPS navigation, real-time traffic alerts and mapping, daily commute times are often unreliable, and relevant updates on how to avoid congestion often reach commuters when they are already stuck in traffic and it is too late to change course.
ENGADGET: IBM shows off Smarter Traveler traffic prediction tool
The same existing technology is being used by some airports to track bags, instead of the often-unreliable barcode labels.
Decisions had to be made on the basis of unreliable data from a sophisticated industrial economy: government statistics in emerging-market economies are often even more unreliable, making the IMF's job that much more difficult.
We have heard from our customers that these types of systems are unreliable and often malfunction, whereas our memory is intrinsically non-volatile.
Just look at the Jaguar E-Type, which is known for its tricky handling and unreliable transmission but often vaunted as the car dreams are made of.
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