Jaspers thought that psychiatrists could diagnose delusions in the same way. He argued that clinicians should not consider a belief delusional based on the content of the belief, but only based on the way in which a patient holds such a belief. (See delusion for further discussion.) Jaspers also distinguished between "primary" and "secondary delusions". He defined primary delusions as "autochthonous", meaning that they arise without apparent cause, appearing incomprehensible in terms of a normal mental process. (This is a slightly different use of the word "autochthonous" than the ordinary medical or sociological use as a synonym for indigenous.) Secondary delusions, on the other hand, he defined as those influenced by the person's background, current situation or mental state.