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Four Cards
Reasoning
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xxxxxxxx xxxx xxxxx xx x xxxxx. xxxx xxxx xxx x xxxxxx xx xxx xxxx xxx x xxxxxxx xxxxx xx xxx xxxxx. xxx xxxxxxx xxxxx xxxxxxx: x, x, xxx, xxx xxxxx. xx xxxxxx xxx xxxxx, "xx x xxxx xxx xx xxxx xxxxxx, xxxx xxx xxxxxxxx xxxx xx xxx," xxxxx xxxx(x) xxxxxx xxx xxxx?

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