But there are   different kinds of erasure,one whose purpose is to remove 
a mark   wilfully,resulting in a blank completely replaced by a differrent 
mark   and no trace of the erasure,one whose purpose is to diffuse a mark 
with possibly anothr mark written over it so that the erasure shows along with 
the diffusion of the underlieing mark-and the accidental erasure,outside of 
wilfull action,which is what this sentence refers to.   It seems sensible.
Kate Sullivan
In a message dated 3/15/10 9:36:20 AM, [email protected] writes:


> What of the mark of erasure- which is often over-written
> 
> 
> On 3/14/10 8:10 PM, "Michael Brady" <[email protected]> wrote:
> 
> On Mar 14, 2010, at 9:07 PM, [email protected] wrote:
> 
> > A good mark must be durable in itself and not easy to remove either
> accidentally or wilfully.

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