I agree that looking at deployment of phrases is a useful way of finding code words, but it is always vulnerable to “cherry-picking.” The second banner you mentioned might or might not have been representative of the movement.
Consider the hypothetical protest filled with “Defend the Constitution, Strike Down Obamacare” posters, which should not be tainted by other posters saying “Keep government out of Medicare”(1) but it is hard to describe an ex ante principle explaining how distinctions should be made.
(1) For non-Americans: Medicare is widely popular government health insurance program for the elderly.
I agree that looking at deployment of phrases is a useful way of finding code words, but it is always vulnerable to “cherry-picking.” The second banner you mentioned might or might not have been representative of the movement.
Consider the hypothetical protest filled with “Defend the Constitution, Strike Down Obamacare” posters, which should not be tainted by other posters saying “Keep government out of Medicare”(1) but it is hard to describe an ex ante principle explaining how distinctions should be made.
(1) For non-Americans: Medicare is widely popular government health insurance program for the elderly.
Agreed—it’s not a mechanical judgment.