These are all plausible explanations for individual cases, but it stretches credulity to believe that they can account for all the pulsar-free remnants that have now been discovered.
In construction, all three explanations could help explain the 26% increase in the number of micro-businesses between 2010 and last year.
Now is not yet the time to dive into all the explanations and policy debates swirling through the news and around the blogosphere.
"We tried to find all possible explanations for this, " the report's author Antonio Ereditato of the Opera collaboration told BBC News on Thursday evening.
In the cases they present in their report, all conventional explanations of something natural or man-made had been eliminated by the authors and their associated teams of experts, and yet these objects were observed at close range by pilots, tracked on radar, and officially photographed.
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In fact, take all such daily explanations of market turbulence with a grain of salt.
But of all the substitute explanations available, why the one which cites a barely viewed video?
Instead, we mostly content ourselves with grudging and sardonic references to the silly side of gentrification, along with a few all-purpose explanations, like broken-window policing.
Voters don't like losing money, they hate losing services, and all the earnest explanations about fighting the good fight together won't put better food on the table or pay the bills.
Interestingly, other students supply all answers and explanations.
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There have been all sorts of explanations of what caused yesterday's crash - from a problem at the main exchange to a strange incident in which someone called Bitcoinbillionaire apparently started giving away large sums on the social news site Reddit.
Thank you for all your time and explanations.
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Leave aside all of the more complicated explanations.
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We can all come up with believable explanations.
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But the problem with at least one of those semi-rational explanations is that all three ratings agencies have today said they're not going to downgrade France from AAA, and also that the price of French government bonds has actually risen today, which would be a good thing for French banks.
Superior mental faculties, such as language and the ability to engage in abstract problem solving, are the sort of explanations that are currently all the rage.
Further, everyone knew that the verdict, either way, was going to be front page news with another several inside pages dedicated to the background, explanations, sidebars and all the rest.
For all that, there are other possible explanations for Mr Litvinenko's condition.
Mr Prewitt complains that he cannot get his staff to focus on census preparations, because explanations to outsiders take up all their time.
The standard explanations for this decline are all unsatisfactory.
The watchdog is calling for a simplification of charging structures for using cards overseas, cash withdrawal fees for UK transactions to reflect the costs of processing, and clearer explanations of exchange rates after all fees are added.
All these oil company moves are disguised with explanations like we are buying US Shale Oil instead, yet an examination of US total discovered Oil reserves shows it accounts for less than 1% of the worlds oil, more importantly most of the so called buying is not buying it options to buy 6 months or more from now.
The System of the United Nations in Cuba will have a booth in the Fair with exhibitions in which the UNESCO Havana Office will be also exhibiting information materials from all the Sectors and a permanent representative to provide explanations and information as requested by visitors.
Eighty potential explanations for the overheating have been investigated, but almost all have proven unfounded.
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"If you just look at, for example, the history curriculum, it's all about sorts of skills... essentially constructing historical narratives, explanations, " he says.
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