However, poor quality products and uncontrolled factors such as accidental loading (for instance impact loading), design faults, construction defects, and lack of maintenance lead to structural failure at loads well below design level or at service life well before design lifetime.
Mercury can make its way into homes through accidental spills (for instance, breakage of thermometers and fluorescent bulbs) as well as through its use in certain cultural and religious practices.
USA Football, whose rulebook is used by Pop Warner and other leagues for players age 6 to 14, prohibits a defender from "initiating contact with the helmet," although in practice almost all seemingly accidental or nonflagrant instances go unflagged.
But critics have raised questions about the Wax Paper's methodology; the study included unplanned accidental home births, for instance.
A tabloid shot of an accidental underwear flash, for instance, sits to the left of a photo of Sevigny coyly raising her skirt by choice.
Some election experts remain concerned about the possibility of accidental "overvotes," when, for instance, someone fills in ovals for two candidates rather than one (something that the levers would not have allowed).
But Amnesty International cited instances of accidental use and claims of deliberate abuse.
There are a few resonant bits of wisdom ("There's a safety in thinking in a diner") and some instances of accidental poetry ("every single thing that is a thing"), but mostly the writing is robotically declarative ("I love the French", "I love dream logic") and so repetitive that it all but induces a trance-like stupor.
I have often heard of instances of accidental sexism in the workplace, such as the bloke chat that monopolises those moments before a meeting starts, social exclusion by men in grey suits and women feeling unable to voice their opinions at certain times.
As was covered earlier this month,YouTube commentors are now presented with a button asking if they'd like to hear their comments read aloud before they are posted, in the hopes of preventing instances of accidental stupidity (the feature is a response to this now-famous comic).
