House of Lords Scotland and Ireland. The House of Lords was reduced to a largely powerless body, with Cromwell and his supporters in the Commons dominating the Government. On 19 March 1649, the House of Lords was abolished by an Act of Parliament, which declared that "The Commons of England [find] by too long experience that the House of Lords is useless and dangerous to the people of England." The House of Lords did not assemble again until the Convention Parliament met in 1660 and the monarchy was restored. It returned to its former position as the more powerful chamber of Parliament—a position
Useless rules change the language accepted by the grammar, nor does omitting the alternative "| "Ee"" from the right-hand side of the rule for "S". Hopcroft, et al. give an algorithm to eliminate useless rules from a context-free grammar. Aiken and Murphy give a fixpoint algorithm to detect which nonterminals of a given regular tree grammar are unproductive. Useless rules In theoretical computer science, in particular in the theory of formal languages, useless rules of a formal grammar are those rules of symbol production that are unreachable or unproductive, that is, that can or need never be applied. Given a context-free grammar,