rationalizable

/ˈræʃənəlaɪzəbəl/
adjective
  1. Able to be explained or justified using logical reasons or sensible thinking.
    • The accountant said the expense was rationalizable because it was necessary for the project.
    • The scientist argued that even strange behavior is rationalizable if you understand the person's background.
    • Many of our fears are not rationalizable, but they still feel very real.