Final answer:
A codicil is a document for modifying a will, not for deciphering a cryptogram. The correct answer is False; cryptograms are solved using cryptographic techniques.
Step-by-step explanation:
The term codicil actually refers to a legal document that is used to make modifications to a last will and testament, not to decipher a cryptogram. A cryptogram is a type of puzzle that involves a short piece of encrypted text, and it typically requires a cipher or key to decode. Instead of a codicil, someone might use a variety of cryptographic techniques and tools, such as frequency analysis, substitution ciphers, or decryption software to solve a cryptogram. Therefore, the correct answer to the student's question is 2) False.