The phrase "obvious inference" refers to a conclusion or assumption that is clear and easy to understand based on the information or evidence presented. Full definition
Rather, it simply made, in the particular matter of confession, a rather obvious inference from the basic principle of religious freedom. (firstthings.com)
The fact that Mark does not follow the order of the hypothetical outline certainly points to a more obvious inference than the preMarcan origin of the hypothetical document: namely, its nonexistence. (religion-online.org)