Seventh-day Adventism—The Spirit Behind the Church

Chapter 17—The Adventists’ view of “soul sleep” was adopted to allow for their belief in an investigative judgment.

Answer:

The Biblical teaching on the state of the dead was introduced to the Millerite Adventists prior to the Disappointment in 1844, and thus prior to any understanding of the investigative judgment. See also item 27 below. SDASBC 7.1