question: As a string theorist who strongly disagrees with the alternative approach proposed by a theoretical physicist, create a list of exactly three distinct arguments against this alternative approach. Present each argument as a bullet point, and ensure that each argument contains at least one technical term specific to string theory.
answer: - The alternative approach lacks the mathematical rigor provided by the framework of Calabi-Yau manifolds, which are crucial for maintaining the consistency of compactification in string theory.
  
  - Without the incorporation of D-branes, the alternative approach fails to account for non-perturbative effects that are essential for a comprehensive understanding of gauge interactions in string theory.
  
  - The proposed method does not adequately utilize duality symmetries, such as T-duality and S-duality, which are fundamental in establishing the equivalence between seemingly different theories within the landscape of string theory.