**TL;DR Summary:** In summary, this post discusses a new stutter hypothesis: Variable Release Threshold (VRT) hypothesis, which combines elements of the Anticipatory Struggle and EXPLAN hypotheses. The VRT hypothesis suggests that anticipating communication difficulties causes people who stutter to set a high threshold for speech plan execution, leading to speech blocks. There are two stuttering subtypes: (1) one related to speech formulation difficulties (incipient stuttering aka from genetics) (2) the other from motor execution difficulties Both error avoidance and error repair mechanisms may play a role in stuttering, with an excessively high release threshold and a low repair threshold influenced by anticipation of speaking difficulty.