Precisely because of its radical instability as a theatrical signifier, playwrights have seized on the prop as a tool for destabilizing the conventional symbolism previously embodied by the now ambiguous object. Although they cannot legislate the prop's impact, playwrights can seek to orchestrate the prop's movement through concrete stage space and linear stage time. They can also shape the audience's reception of the prop through dialogue and stage directions. . . . This is especially the case during periods of semiotic crisis, when the meaning of the object the prop represents is (quite literally) up for grabs. —Andrew Sofer, The Stage Life of Props
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Yair Lipshitz (2013) studied this question.
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