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Modal windows are sometimes called heavy windows or modal dialogs because they often display a dialog box. User interfaces typically use modal windows to command user awareness and to display emergency states, though interaction designers argue they are ineffective for that use. [1] Modal windows are prone to mode errors. [1] [2] [3]
The bowler may then dislodge the bails at their end without completing the run-up and dismiss the batter. This form of run-out is sometimes called the Mankad (the dismissed batter is said to have been "Mankaded"), in reference to Vinoo Mankad , the first bowler to dismiss a batter in this manner in a Test match, running out Bill Brown in 1947.
It is a normal modal logic, and one of the oldest systems of modal logic of any kind. It is formed with propositional calculus formulas and tautologies , and inference apparatus with substitution and modus ponens , but extending the syntax with the modal operator necessarily {\displaystyle \Box } and its dual possibly {\displaystyle \Diamond } .