- From: Barry Norton <barry.norton@aifb.uni-karlsruhe.de>
- Date: Thu, 09 Sep 2010 09:12:40 +0200
- To: Pat Hayes <phayes@ihmc.us>
- CC: Michael F Uschold <uschold@gmail.com>, Martin Hepp <martin.hepp@ebusiness-unibw.org>, semantic-web@w3.org
On 09/09/10 06:09, Pat Hayes wrote: > > Um... don't the (natural) categories of powered boat, sailboat and > rowboat capture the needed distinctions here quite adequately? I have > no idea whether a kayak is usually called a rowing boat, but it > clearly belongs in a natural class of boats propelled by arm muscles > holding a paddle or oar. BTW, there are, or once were, sea-going ships > in all these three categories. > > No, rowing and paddling are two completely different actions, though I have some sympathy for a properly named class for "natural class of boats propelled by arm muscles holding a paddle or oar" (as long as this isn't called rowing). Since you mention sea kayaks by the way, these can violate "traditionally has a covered deck" (is 'traditionally' useful in a definition?) and furthermore I wonder if a distinction can be drawn (within the continuum in reality) between transport kayaks (including sea kayaks), surf skis and, at the extreme, stand-up paddle surfboards in a 'vehicle' ontology. What I mean is that I'd venture there's no historical use of a paddle surfboard for transport. (I also wonder whether anyone would accept a surfboard as a boat, though it possibly doesn't contradict the definition other than in this regard). Barry
Received on Thursday, 9 September 2010 07:13:11 UTC