pathological

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pathological

(less commonly), pathologic
1. of or relating to pathology
2. relating to, involving, or caused by disease
3. Informal compulsively motivated

pathological

(1)
[scientific computation] Used of a data set that is grossly atypical of normal expected input, especially one that exposes a weakness or bug in whatever algorithm one is using. An algorithm that can be broken by pathological inputs may still be useful if such inputs are very unlikely to occur in practice.

pathological

(2)
When used of test input, implies that it was purposefully engineered as a worst case. The implication in both senses is that the data is spectacularly ill-conditioned or that someone had to explicitly set out to break the algorithm in order to come up with such a crazy example.

pathological

(3)
Also said of an unlikely collection of circumstances. "If the network is down and comes up halfway through the execution of that command by root, the system may just crash." "Yes, but that's a pathological case." Often used to dismiss the case from discussion, with the implication that the consequences are acceptable, since they will happen so infrequently (if at all) that it doesn't seem worth going to the extra trouble to handle that case (see sense 1).
References in periodicals archive ?
In ultrathin sections through the pathologically altered skin tissue of budgerigars, virus particles were present in both nuclei and cytoplasm of epidermal cells, often in crystalline form.
Patients with early disease are either asymptomatic or present with cough or mild COPD, but radiographically and pathologically may have significant abnormalities, including fibrosis.
The youngsters' world comes alive through the idiosyncratic characters with which Murr has populated his novel, from Ruth, an emotionally-remote romantic novelist, to the pathologically vain Reverend Hewitt.
The main hope is that it can help people with pathologically low trust levels," such as people with autism or phobias.
Those things presumed by historians to chronically and pathologically divide Spain and Spaniards--class, political ideology, nationalism(s), etc.
Second, a mild CSF lymphocytic pleocytosis is consistent with an infectious or inflammatory CNS disorder, though rare occurrences have been reported in pathologically confirmed Creutzfeldt-Jakob Disease (CJD) (12).
He was vocally impeccable, but so was the rest of the cast: soprano Nathalie Paulin, an exquisitely refined yet fervently driven Melisande; baritone Gaetan Laperriere, a brooding and pathologically suspicious Golaud; and mezzo-soprano Jean Stilwell, intense and memorable, even in the tiny role of Genevieve.
Nevertheless, it will take years for doctors to pathologically stop hating HMOs.
Mind you, even a person as pathologically messy as me isn't as bad as some of the people featured in this new series.
His self-portraits--one a gorgeously carved hunting decoy (Sitting Duck, 2002) and another a collage of hundreds of little cutout pictures of assholes (Big Asshole, 2001)--are desolately narcissistic, pathologically glib, and plenty mean-spirited.
Endometriosis was pathologically proven in 70 patients for a recurrence rate of 8.
ONE DAY AFTER THE ONE-YEAR ANNIVERSARY of 9/11, during a time when his administration seemed almost pathologically determined to maneuver America between Iraq and a very hard place, President Bush had a little-noticed meeting with a group of political leaders from Africa's oil-rich Gulf of Guinea.