Why can’t molecularity of any reaction be equal to zero?

(N/A) Molecularity is defined as the number of reacting species (atoms,ions,or molecules) taking part in an elementary reaction,which must collide in order to bring about a chemical reaction. Since a chemical reaction cannot occur without the participation of at least one reactant molecule,the minimum value for molecularity is $1$. Therefore,molecularity cannot be zero.