Postmodern theatre challenges traditional notions of:

a. Authorship, truth, and storytelling boundaries
b. Human emotions and relationships
c. Emotional depth and authenticity
d. Logical and coherent narratives

All of the above options are correct. Postmodern theatre challenges traditional notions of authorship, truth, storytelling boundaries, human emotions and relationships, emotional depth and authenticity, and logical and coherent narratives.

a. Authorship, truth, and storytelling boundaries: Postmodern theatre often blurs the line between author and reader by incorporating non-linear narratives, multiple voices, and audience participation. It questions the authority of the playwright and challenges traditional notions of truth and objective reality.

b. Human emotions and relationships: Postmodern theatre may disrupt traditional depictions of emotions and relationships, often emphasizing the performative nature of emotions and exploring the influence of social constructs on personal relationships.

c. Emotional depth and authenticity: Postmodern theatre often questions the idea of emotional depth and authenticity, challenging the traditional belief that theater should strive for a sense of realism. It may employ irony, sarcasm, self-consciousness, and other techniques to evoke emotions in unconventional ways.

d. Logical and coherent narratives: Postmodern theatre often rejects linear and coherent narratives, favoring fragmented, non-linear, and even contradictory structures. It challenges the notion that a play should have a clear beginning, middle, and end, and may intentionally disrupt audience expectations of a logical progression.