Why do scholars doubt that St. Paul wrote 1 Timothy, 2 Timothy, and Titus?

Scholars widely doubt that St. Paul the Apostle authored 1 Timothy, 2 Timothy, and Titus—collectively known as the Pastoral Letters—primarily due to significant discrepancies when compared to his undisputed writings.1

The primary reasons for this skepticism include:

• Linguistic and Stylistic Differences: Statistical and linguistic analyses reveal distinct differences in vocabulary, syntax, and the use of particles and connectives that are inconsistent with Paul’s known writing style.1
• Church Organization: The letters depict a more developed church hierarchy, including specific roles for bishops and deacons, which reflects a later period of church history than that of Paul’s own ministry.2
• Theological and Historical Context: The letters address heresies—often identified as early forms of Gnosticism—and reflect a shift away from the high apocalyptic tension characteristic of Paul’s genuine letters toward a more settled, institutionalized church life. Furthermore, the biographical details regarding Paul’s travels do not align with accounts found in his other letters or the Acts of the Apostles.12

Consequently, many scholars classify these epistles as "deutero-Pauline," suggesting they were written by later followers in the tradition of Paul to provide authoritative guidance on church discipline and doctrine.342