Message-Id: <m2HAba1-00007hC@xiron.pc.helsinki.fi>
Date:         Wed, 15 Mar 1995 22:55:58 +0000
Reply-To:     ucleaar <ucleaar@UCL.AC.UK>
Sender:       Lojban list <LOJBAN%CUVMB.bitnet@FINHUTC.hut.fi>
From:         ucleaar <ucleaar@UCL.AC.UK>
Subject:      Re: selbri as sumti
To:         lojban@cuvmb.cc.columbia.edu
In-Reply-To:  (Your message of Tue, 14 Mar 95 12:24:49 T.)
Content-Length: 1509
Lines: 37

Goran:
> > No event of me brushing my teeth happens every day.
> > But every day there is an event of me brushing my teeth.
> I don't agree.
> I think:
>      Ex: x is an activity of my brushing teeth every day composed of
>          events of my brushing my teeth once
> and   'activities' is subclass of 'events'
>  =>   Ex: x is an event of my brushing teeth every day

In some recent message I did say that a mass of toothbrushings or
shoppings or whatever could be distributed over all days.

Activities are a subclass of events, true. But it is mistaken to
assume that any situation of a given type can necessarily be
construed as a situation of another type. For example, a state
cannot be construed as an achievement, or vice versa.

The activity you mention is a set (or mass of many individuals) of
teeth-brushings (each of which is either an activity or an
accomplishment, depending on whether you view it as intrinsically
bounded). Since this set inherits certain properties of its
members, i.e. duration, and since some Lojbo authorties think sets
don't inherit properties from their members, I'd better call it
a mass rather than a set.

I recognize that when it comes to situations, Lojban may
exceptionally blur the distinction between individuals and masses,
but be that as it may, I disagree with your formulation, but
will readily go along with:

  Ex x is a mass, Ay if y is a constituent of x then y is an
   event of tooth-brushing, Az if z is a day then x is located at
   z.

----
And