or provided separately. Some schools that do not provide a tassel for graduates to keep may offer a souvenir tassel that is not worn with the regalia. Traditional wear As with other forms of headdress, academic caps are not generally worn indoors by men (other than by the Chancellor or other high officials), but are usually carried. At the University of Oxford, caps are mandatory dress for matriculation events and for all examinations. It is a commonly repeated myth at Oxford that the cap must be held and may not be worn at all except at the student's graduation; however, there is no rule in the university to this effect, and undergraduates wearing formal academic dress may either carry the cap or wear it. In particular, women undergraduates who exercise the right to wear a soft "Canterbury" cap must wear it on their head, rather than carrying it. Additionally, all undergraduates appearing before the Proctors' Court are required to present themselves wearing their caps, before removing them as proceedings start. In some graduation ceremonies caps have been dispensed with for men, being issued only to women, who do wear them indoors, or have been abandoned altogether. This has led to urban legends in universities in the United Kingdom and Ireland which have as a common theme the idea that the wearing of the cap was abandoned in protest at the admission of women to the university. In Ireland, a common belief, holds that only women wear the mortarboard because a bachelor's degree was thought to be the maximum education they could attain and thus represented the 'capping' of their education, however there is little evidence for this. Dr. David Fleming of the History Department at the University of Limerick called this reason 'complete nonsense and an urban myth', while the university's gown partner, Phelan Nolan said 'Women used to wear hats in Church and that is where the tradition has come from'. There are several types of mortarboard. The most common in the UK is the 'folding skull' in which the skull part can be folded for ease of storing and carrying. Traditionally, the mortarboard had a 'rigid skull' which is considered more aesthetically pleasing and better fitting than a folding-skull one. In addition, the rigid skull type has the advantage of being easier to doff than the folding skull version, as there is no possibility of the skull collapsing