David how is an exact quote a summary or interpretation?
An exact quote, backed up by the actual audio track is... exact.
You are not summarizing it, and you are not interpreting it either.
You are presenting it.
The point David is making is that you are selecting material to quote and
add.
This is a problem that happens a lot anyway; you might have a lengthy piece
of audio, video or text that discusses material - picking a few points to
quote is in itself interpreting what it important. This is why secondary
sources are better - because they do the selection for us :)
Tom