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It refers to the choice of "denying reality" in order to champion a claim or [[theory]].

It refers to the choice of "denying reality" in order to champion a claim or [[theory]].

One of the most well-known examples of denialism concerns the assertion that the extermination of Jews (see [[Holocaust denial]]) during the [[second world war]] never in fact happened.  

One of the most well-known examples of denialism concerns the assertion that the extermination of Jews (see [[Holocaust denial]]) during the [[Second World War]] never in fact happened.  

Another example is the ex-President of [[South Africa]], Thabo Mbeki, who argued against the scientific consensus that [[HIV]] caused [[AIDS]]. This led to policies preventing thousands of HIV positive mothers in South Africa from receiving anti-retrovirals. It's estimated these policies led to the loss of more than 330,000 lives.<ref>[http://journals.lww.com/aidsonline/pages/articleviewer.aspx?year=2002&issue=16004&article=00007&type=fulltext Denial and defiance: a socio-political analysis of AIDS in South Africa]</ref>

Another example is the ex-President of [[South Africa]], Thabo Mbeki, who argued against the scientific consensus that [[HIV]] caused [[AIDS]]. This led to policies preventing thousands of HIV positive mothers in South Africa from receiving anti-retrovirals. It's estimated these policies led to the loss of more than 330,000 lives.<ref>[http://journals.lww.com/aidsonline/pages/articleviewer.aspx?year=2002&issue=16004&article=00007&type=fulltext Denial and defiance: a socio-political analysis of AIDS in South Africa]</ref>