How do you know something is uncountable?<br/><br/>Besides that,<br/><br/>I know the <span style="color:#008080;">cause</span> of his death.<br/><br/><a href='http://dictionary.cambridge.org/dictionary/british/cause_1?q=cause' target='_blank' rel='nofollow'>http://dictionary.cambridge.org/dictionary/british/cause_1?q=cause</a><br/><br/>It is marked as C or U. So it is one reason or many reasons?