context1: Hence, its proponents are known as analytic or conceptual functionalists. The <strong>essential</strong> difference between analytic and psychofunctionalism is that the latter emphasizes the importance of laboratory observation and experimentation in the determination of which mental state terms and concepts are genuine and which functional identifications may be considered to be genuinely contingent and a posteriori identities. The former, on the other hand, claims that such identities are <strong>necessary</strong> and not subject to empirical scientific investigation.
context2: This involves establishing a stable airway, breathing rate and circulatory system as an <strong>essential</strong> first step. Ventilation is considered when there is a low respiratory rate or when blood gases show the person to be hypoxic. The next <strong>necessary</strong> step is to treat for shock.