Question

Silas held the scalpel with the cold, unwavering stability of a man who believed only in what could be measured, weighed, and cataloged. In the lecture halls of the metropole, he had argued fiercely against the 'backward provincial ignorance' that clung to charms and ancestral spirits, earning a reputation as a cold rationalist. Yet, as the fever-stricken boy lay on the cot before him, Silas’s left hand slipped quietly into his waistcoat pocket, his fingers tracing the smooth, irregular contours of a dried mountain root given to him by his grandmother. He did not believe in its efficacy—he had written a treatise debunking such remedies—but he did not remove his hand from the pocket until the incision was made and the boy's breathing stabilized. Later, when the boy's mother offered her tearful thanks to the patron saint of the hearth, Silas corrected her with sharp, clinical brevity, attributing the recovery entirely to the sanitary conditions and the precise dosage of quinine. He walked home under the cold starlight, feeling both the weight of his scientific triumph and the small, dry knot of wood pressing against his ribs like a silent accusation.

In the passage, Silas’s decision to hold the grandmother's mountain root while performing the surgery, despite his public denunciation of folk remedies, primarily functions to do which of the following?