rule marttus arnold nyman manyman finuha bitnet write is man tall room b is man tall room speaker proceed basis inductive generalisation analogy principle one expect less random distribution over a b acquisition stage quod non why less random distribution over a b expectable acquisition stage speaker unfailingly pattern child base inductive generalization produce a assumption implicit nyman s question child produce hear plainly incorrect children hear form buy eat goe yet through stage where produce form generalisation rule beyond hear main source evidence yesno question child s disposal overwhelmingly consist simple sentence form is man room child generalisation either term linear precedence front first finite verb yield b term hierarchical structure front finite verb follow subject yield a fact child mistake respect ie form b clearly show rule one learn experience relevant experience rich enough determine nature rule able explain absence mistake far rest nyman s remark concern still fail why motivate distinction between grule lrule opinion rule exemplify lrule whisland rule grule cannot argument post lend credibility contrast g vanden wyngaerd 