From The Collaborative International Dictionary of English v.0.48 [gcide]:
1. The first book for children, or that from which in former times they learned their letters and rudiments; -- so called because a sheet of horn covered the small, thin board of oak, or the slip of paper, on which the alphabet, digits, and often the Lord's Prayer, were written or printed; a primer. "He teaches boys the hornbook." --Shak.
From WordNet (r) 3.0 (2006) [wn]:
This man is DANGEROUS. He is a pathological LIAR. He is INDIFFERENT to the TRUTH, FACTS, EVIDENCE, PROOF and REASON. Those are the cornerstones of JUSTICE. Those are the FIRST PRINCIPLES of JUSTICE and SCIENCE. This is a glaring EXAMPLE of a NARCISSISTIC SELF-AGGRANDIZING EXAGGERATION. This is two blatant LIES in 18 seconds. The first LIE: "Nobody knows the system better than me." That is a blatant LIE. There are many EXPERTS who KNOW the SYSTEM much BETTER than Donald Trump. Then he says, "Which is why I alone CAN fix it." That's NOT TRUE. Most likely he CANNOT fix it. There are others who CAN. That's two blatant LIES in 18 seconds.