This is the first of a series of 'problem posts' detailing debates and questions confronting the community of magic-users in TRoAPW.
Premise
It is known that a journeyman mage will be able to hold and successfully cast X number of spells each day. However, X will vary between magic-users, even magic-users of similar years of training in the same tradition. Further, X is always self-reported - an observer has no way of knowing if a magic-user is keeping something back.
Thus, proposals exist to assess X by various means. The hypothetical study of measuring spell capacity is called Pneumametrics. A proponent is known as a Pneumametrician.
The State of the Art
Pneumametricians have not yet devised a means by which they have successfully measured the number of spells a magic-user possesses. Proposed means of doing so include the analysis of a magic-users bodily fluids, rearing twins with magical potential, modified Detect Magic spells and the composition of vast comparative tables.
The use of Charm spells to induce truth and the use of Auguries are variously considered either invasive, too resistible or overparticular for true Pneumametrics. Indeed, the possibility that someone might try and compel the information is sometimes cited by Pneumametricians as a reason for developing a non-invasive method.
Opponents of Pneumametrics
Pneumametrics has its opponents, but these are not usually united. They do not write journals dedicated to overturning the reputation of Pneumametrics or test theories about why you can't reliably measure an individual wizard's spell capacity. They reserve their positive efforts for other spheres.
Such opponents commonly include mystics, exceptionalist mages ('the occult traditions of the Cerulean Order cannot be assessed so lightly!'), sceptical rule-makers and traditionalists.
Naturally, Pneumametricians regard opponents as reactionaries and fools. Opponents of Pneumametrics regard them as snake oil salesmen.
Pneumametrics divided
However, of that group called Pneumametricians two camps emerge.
The Unicameralists assert that the magical energies of a magic user are reserved within one chamber. The Polycameralists assert that the magical energies are held within a number of chambers.
The former are known as 'windbags', after a pamphlet outlining the position described the magic-user as a man inflating bladders (with the nature of the bladder influenced by its origin). Later Unicameralist publications quite deliberately use differently coloured and shaped paper bags as an example.
The latter are known as 'butlers' - spells being like the wine held in a variety of bottles. Polycamaralists are glad that their nickname is not associated with bladders or wind, but still bristle at being likened to servants.
Implications
What if the Pneumametricians are right? What if someone can somehow determine the quantity of spells a wizard can cast independently?
Well, to begin with one might expect a greater use of magics. Mages could be assessed with a certain set of standards: a trained soldier can march X miles with a full pack, a trained wizard can cast Y first level spells in a day. It would be an end to the hedge wizard and the court mage; the adept that could once cite exhaustion, or lack of resources, or mystical circumstances to refuse an aristocratic patron would find it more difficult to do so. A magic-user could still bewilder the layman, but the benefit of the doubt would be lost.
The loose magical college and its quasi-feudal privileges and rights is set aside for employer-employee relationships. Wizards are no longer 'priests'; they are 'lawyers'. Beyond this, there might be the production of official mage-cadres to be deployed in dedicated military capacities. This last part is a favourite theme of Opponents of Pneumametrics, usually employing the spectre of a 'malevolent foreign potentate' - our own beloved Sovereign would never do such a thing.
Even further in the future is the potential for centralised wizarding assessment and certification (rather than reputation - 'she trained under Malphoebe') and the attendant bureaucracy. But that is likely beyond the lifespan of any player character.
Debates such as these are poised to be a cornerstone of TRoAPW. The next one is probably going to be on the necessity of spellbooks.
Comments, nitpicks, &c welcome - I'd rather work out the problems now than later.