Speaking only
for text, you'd have an ethical (and, quite possibly, a legal)
obligation to leave the quotation as-is; otherwise you're saying someone said
something they did not.
As-is to an extent that avoids lying, yes,
but not to the extent that fixes an invariant section.
For example, if an original (by Dr. X) said
"Churchill was a pompous windbag that everybody hated.",
then I might write "Dr. X wrote "Churchill was a pompous windbag".",
which is fair use in the context of an encyclopaedia article,
and release that under the FDL. Then a derivative FDL encyclopaedia
should be able to shorten it to "Dr. X called Churchill "a pompous
windbag".",
but that wouldn't be possible if my FDL release classified the quotation
as an invariant section.
Yes it would be, as Invariance only make a specific section
non-modifiable, it does not stop you from deleting the invariant section
and replacing with an equivalent statement.
Imran
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