"Methods can also have the property of "idempotence" in that ... the side-effects of N > 0 identical requests is the same as for a single request." [1]
The HTTP spec clearly talks in terms of the effect of sequences of repeated operations, not in terms of the results of individual operations. The side effects of a single logout are the same as for 6 - you are logged out and whatever logout triggers exist are executed once.
The HTTP spec clearly talks in terms of the effect of sequences of repeated operations, not in terms of the results of individual operations. The side effects of a single logout are the same as for 6 - you are logged out and whatever logout triggers exist are executed once.
[1] http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.1...