1 /* This file is part of the project "Hilbert II" - http://www.qedeq.org" target="alexandria_uri">http://www.qedeq.org 2 * 3 * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. 4 * 5 * "Hilbert II" is free software; you can redistribute 6 * it and/or modify it under the terms of the GNU General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 package org.qedeq.kernel.se.base.module; 17 18 19 /** 20 * Usage of Modus Ponens. 21 * <pre> 22 * A -> B 23 * A 24 * ------ 25 * B 26 * </pre> 27 * 28 * @author Michael Meyling 29 */ 30 public interface ModusPonens extends Reason { 31 32 /** 33 * Get this reason. 34 * 35 * @return This reason. 36 */ 37 public ModusPonens getModusPonens(); 38 39 /** 40 * Get reference to formula. Usually this a formula of type A -> B 41 * 42 * @return Reference to previously proved formula. 43 */ 44 public String getReference1(); 45 46 /** 47 * Get reference to formula. Usually this a formula of type A 48 * 49 * @return Reference to previously proved formula. 50 */ 51 public String getReference2(); 52 53 }