code: def assertit(self):
          
          if self.asserted:
              raise RuntimeError("Fact already asserted")
  
          lib.EnvAssignFactSlotDefaults(self._env, self._fact)
  
          if lib.EnvAssert(self._env, self._fact) == ffi.NULL:
              raise CLIPSError(self._env)
docs: Assert the fact within the CLIPS environment.