Final answer:
The phrase 'neither a borrower nor a lender be' is incorrectly attributed to Horatio; it is spoken by Polonius in Shakespeare's play, Hamlet.
Step-by-step explanation:
The statement "Horatio is the speaker of the phrase 'neither a borrower nor a lender be'" is false. This phrase is actually spoken by the character Polonius in William Shakespeare's play, Hamlet. It is part of the advice that Polonius gives to his son, Laertes, before Laertes leaves for France in Act 1, Scene 3. To provide a more complete understanding of the quote within the context of the play, it is reflective of Polonius’s view of being prudent and cautious in one's personal and financial dealings.