In 'Chronic Diseases', Para 37, Hahnemann clearly explains what causes MIASM Of PSORA:
The itch disease is, however, also the most contagious of all chronic miasmata, far more infectious than the other two chronic miasmata, the venereal chancre disease and the figwart disease. To effect the infection with the latter there is required a certain amount of friction in the most tender parts of the body, which are the most rich in nerves and covered with the thinnest cuticle, as in the genital organs, unless the miasma should touch a wounded spot. But the miasma of the itch needs only to touch the general skin, especially with tender children. The disposition of being affected with the miasma of itch is found with almost everyone and under almost all circumstances, which is not the case with the other two miasmata.
No other chronic miasma infects more generally, more surely, more easily and more absolutely than the miasma of itch; as already stated, it is the most contagious of all. It is communicated so easily, that even the physician, hurrying from one patient to another, in feeling the pulse has unconsciously inoculated other patients with it; wash which is washed with wash infected with the itch; new gloves which had been tried on by an itch patient, a strange lodging place, a strange towel used for drying oneself have communicated this tinder of contagion; yea, often a babe, when being born, is infected while passing through the organs of the mother, who may be infected (as is not infrequently the case) with this disease; or the babe receives this unlucky infection through the hand of the midwife, which has been infected by another parturient woman (or previously); or, again, a suckling may be infected by its nurse, or, while on her arm, by her caresses or the caresses of a strange person with unclean hands; not to mention the thousands of other possible ways in which things polluted with this invisible miasma may touch a man in the course of his life, and which often can in no way be anticipated or guarded against, so that men who have never been infected by the psora are the exception. We need not to hunt for the causes of infection in crowded hospitals, factories, prisons, or in orphan houses, or in the filthy huts of paupers; even in active life, in retirement, and in the rich classes, the itch creeps in. The hermit on Montserrat escapes it as rarely in his rocky cell, as the little prince in his swaddling clothes of cambric.
I WONDER HOW OUR 'MIASMATIC EXPERTS' COULD CREATE SO MUCH CONFUSIONS REGARDING 'THEORY OF MIASMS'?
What would you say, after carefully reading the above-quoted words of hahnemann? I think he had explained his concept of PSORA here beyond any doubt.
Would you still argue, 'miasm is genetically inherited'?