Date: Apr 4, 2013 5:08 PM
Author: William Hughes
Subject: Re: Matheology § 224

On Apr 4, 10:45 pm, WM <mueck...@rz.fh-augsburg.de> wrote:
> On 4 Apr., 20:57, William Hughes <wpihug...@gmail.com> wrote:

<snip>

> > A collection need not share a property
> > that every one of its elements has.  In this case
> > every one of the elements of the collection has the property
> > that it can be removed without changing the union.
> > The collection does not have this property.

>
> That is impossible if all elements can be removed.


Nope. Any single element can be removed. This does not
mean the collection of all elements can be removed.