Final answer:
The statement that D and E-double flat are enharmonic is true; they are different notations for the same pitch. This is a crucial concept in music theory, especially valuable when reading music or learning an instrument such as the piano.
Step-by-step explanation:
The statement that D and E-double flat are enharmonic is true. In music, the term 'enharmonic' refers to two different notations for the same pitch, meaning they sound the same but are written differently. D natural (simply written as D) is equal in pitch to E double-flat (written as Ebb), even though they have different names. This can be particularly useful information when learning to play the piano or reading music. Remembering the lines of the treble clef as E, G, B, D, and F through the mnemonic "Every good boy does fine" helps in identifying the pitch of the notes on the staff, which directly relates to their enharmonic equivalents on the keyboard or instrument you are playing.