Idioms

<p>I’m confused about the meaning of </p>

<p>D) there’s no smoke wo/ fire
E) blood is thicker than water </p>

<p>Bump??</p>

<p><a href=“THERE'S NO SMOKE WITHOUT FIRE definition | Cambridge English Dictionary”>http://dictionary.cambridge.org/us/dictionary/british/there-s-no-smoke-without-fire&lt;/a&gt;&lt;/p&gt;

<p><a href=“BLOOD IS THICKER THAN WATER definition | Cambridge English Dictionary”>BLOOD IS THICKER THAN WATER definition | Cambridge English Dictionary;

<p>Are these idioms meant to be memorized? </p>