California, United States of America
The following excerpt is from People v. Young, B264878 (Cal. App. 2016):
(Chapman v. California (1967) 368 U.S. 18, 24; People v. Cunningham (2001) 25 Cal.4th 926, 998 [the complete exclusion of evidence intended to establish an accused's defense may impair his or her right to due process of law, but the exclusion of defense evidence on a minor or subsidiary point does not interfere with that constitutional right].)
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