In his article on pre-conventions, Celano presents, what the author calls, the Ontological Commitment Thesis and the Normative Bite Thesis. In this short comment, the author argues that the two theses are together both incompatible with the idea that pre-conventions are facts which have causal powers in human behaviour; also, if the ontological thesis is abandoned, normative determination could not be obtained. In other terms, the author argues that either pre-conventions (as part of the Background) are part of our causal explanation of human behaviour or pre-conventions are abstract entities able to determine human behaviour normatively. In the first case, pre-conventions lack normative meaning, while in the second pre-conventions cannot integrate our causal explanation of human actions. Tertium non datur.