In constructions like “Zaydan ʿaraftu,” preposing may be discussed in terms of emphasis (taʾkīd) or restriction (takhṣīṣ). The source notes that the analysis of the implied governing verb and the expressed verb affects the characterization; no single English gloss covers every setting.
Emphasis reinforces the identification of Zayd. Restriction goes further by excluding a relevant competing alternative from the asserted relation.
In response to “Was it Zayd or ʿAmr whom you recognized?”, restricted focus is natural. Without such a contrast, an unlimited claim of exclusivity may be unwarranted.