Editing 1970: Name Dominoes
Revision as of 23:50, 21 March 2018 by JohnHawkinson (talk | contribs) (→Explanation: Remove parenthesis claiming a fixed set wouldn't need a validity rule. A very large fixed set (product of all known first and last names, e.g.) could very well need such a rule. Large != Infinite. Retain implication language.)
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