illustrating "post hoc, ergo propter hoc": The Dark Side of Chocolate

 the video shows how child labourers are under the severe situation. it treats a topic of child labor relating to chocolate we usually eat. from this video, we can understand what is "post hoc, ergo propter hoc". watch the video and then continue to reading.

http://www.youtube.com/watch?feature=player_detailpage&v=KXWFXeIZY9g


 after i watched the video, a logical inference can be thought.
in this video, a narrator said that rich children such as in Canada love to eat chocolate, and then eat them without knowing labourers. and also the man said that child labourers in a cacao plantation apply for many of them. according to these information, you might thought following.

children in developed country bought many boxes of chocolates. after that, the number of child labourers working in a cacao plantation were increased. therefore, we can think that buying chocolates must have been the cause of increasing of child labourers there.

if you think so, it is not correct. that is an example of post hoc, ergo propter hoc. although we tend to relate the first phenomenon with the second one, it is not always correct. in this case, buying chocolate wasn't connected with the number of child labourers directly. these phenomenon were occurred separately. there is a case that the chocolate products are traded fairly from Africa. therefore, we have to care not to think so simply.