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Underload (vigilance conditions) can also negatively affect SA. The complexity of the systems and situations a person is in can negatively affect SA by making it difficult to form accurate mental models. Automation is a major factor reducing situation awareness in many environments (e.g. aviation, driving, power operations).
In the above situation of "N whenever S," N is said to be a necessary condition for S. In common language, this is equivalent to saying that if the conditional statement is a true statement, then the consequent N must be true—if S is to be true (see third column of " truth table " immediately below).
Other terms used include grave, extremely critical, critical but stable, serious but stable, guarded, [3] and satisfactory.. The American Hospital Association has advised doctors not to use the word "stable" either as a condition or in conjunction with another condition, especially one that is critical, as it inherently implies unpredictability and the instability of vital signs. [2]
The distinction between the two lies in the potential veracity of the assumption. A hypothetical condition assumes a condition which is known to be contrary to fact whereas an extraordinary assumption assumes a condition or a fact which is merely unknown or uncertain. The results of an analysis involving any hypothetical conditions are known to ...
Conditional clauses are generally divided into three types: open conditions, [3] when the truth of the condition is unknown ('if it is true that...'); ideal conditions, in which the speaker imagines a situation or event which might occur in the future ('if this were to happen...'); and unreal conditions, referring to an event or situation in ...
A full conditional thus contains two clauses: the subordinate clause, called the antecedent (or protasis or if-clause), which expresses the condition, and the main clause, called the consequent (or apodosis or then-clause) expressing the result. To form conditional sentences, languages use a variety of grammatical forms and constructions.
Many conditions are indicated by a group of known signs, or signs and symptoms. These can be a group of three known as a triad; a group of four ("tetrad"); or a group of five ("pentad"). [citation needed] An example of a triad is Meltzer's triad presenting purpura a rash, arthralgia painful joints, and myalgia painful and weak muscles.
However, there are certain situations where will can appear in a condition clause. One type of situation is referred to above under zero conditional, where will expresses futurity, but the sentence as a whole expresses factual implication rather than a potential future circumstance: "If aspirins will cure it, I'll take a couple tonight" (the ...