  We introduced fermionic variables in complex modules over real Clifford
algebras of even dimension which are analog of the Witt basis. We built
primitive idempotents which are a set of equivalent Clifford vacuums. It is
shown that the modules are decomposed into direct sum of minimal left ideals
generated by these idempotents and that the fermionic variables can be
considered as more fundamental mathematical objects than spinors.
