In the passage from her address to the troops at Tilbury, Queen Elizabeth I makes appeals to ethos and pathos. To encourage her troops, she explains that she supports and relies on them, and she tries to stir their feelings of loyalty toward her. In the passage from the speech to Parliament, on the other hand, Elizabeth appeals to logos. She logically analyzes the lawmakers' request and reminds them of the limitations of their powers.
I would say that sometimes you would not 'identify' a mistake in your head. Also if you read it out loud you might realize how it does not make sense in your sentence.
