explanation.
I would have figured it out myself had I paid attention to the fact
that the error message reports "row names" rather than "column names",
or had the error message actually contained the conflicting names
(either "0" or "1") or the full
--Apple-Mail-44--797532055
Content-Type: text/plain;
charset=US-ASCII;
format=flowed;
delsp=yes
Content-Transfer-Encoding: 7bit
I believe read.table may report misleading errors. In this example,
where a header line in a file has an incorrect number of row names (28
in