Race condition
Race conditions arise in software when an application depends on the sequence or timing of processes or threads for it to operate properly. As with electronics, there are critical race conditions that result in invalid execution and bugs. Critical race conditions often happen when the processes or threads depend on some shared state. Operations upon shared states are critical sections that must be mutually exclusive. Failure to obey this rule opens up the possibility of corrupting the shared state.
Pre-existing condition
According to a Reason.com libertarian opinion blog by Peter Suderman, the 'Pledge to America' issued by the Republican Party in September 2010 stated, "Health care should be accessible for all, regardless of pre-existing conditions or past illnesses... We will make it illegal for an insurance company to deny coverage to someone with prior coverage on the basis of a pre-existing condition." In a March 3, 2010, address, President Barack Obama said that coverage denied to those with pre-existing conditions is a serious problem that would only grow worse without major reforms. In a September 2010 visit with Falls Church, Virginia, residents, Obama referred to a woman with an eye condition and a woman with non-Hodgkin's lymphoma as personal examples in the audience of those benefiting from changing pre-existing condition rules.