Autobiographical references: Shakespeare's works contain many references to his own life and experiences, including his birthplace (Stratford-upon-Avon), his education, and his family.
Style and language: Shakespeare's writing style is unique and distinctive, and it is unlikely that someone else could have consistently imitated it over such a long period of time.
Collaborative works: Shakespeare collaborated with other playwrights on a few occasions, but these works are clearly distinguishable from his solo works in terms of style and content.
Lack of evidence to the contrary: There is no credible evidence to support the claim that someone else wrote Shakespeare's works. The theory that he was a front for another writer is based on speculation and circumstantial evidence.
However, it is important to note that some scholars and historians believe that Shakespeare may have had assistance from other writers, such as Christopher Marlowe or Francis Bacon. However, the consensus among most experts is that Shakespeare was the primary author of his works.