We maintain that in many contexts promising to try is expressive of responsibility as a promiser. This morally significant application of promising to try speaks in favor of the view that responsible promisers favor evidentialism about promises. Contra Berislav Marusˇic´, we contend that responsible promisers typically withdraw from promising to act and instead promise to try, in circumstances in which they recognize that there is a significant chance that they will not succeed.
D'Cruz, Jason R. and Kalef, Justin, "Promising to Try" (2015). Philosophy Faculty Scholarship. 44.