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Statement:Only a few rivers are lakesAll rivers are oceanAll oceans are streamConclusion: All stream being lakes is a possibilityAt least some oceans are riversIf only conclusion 1 followIf neither conclusion 1 nor conclusion 2 followsIf conclusion 1 and 2 both followIf only conclusion 2 follows

Question

Statement:Only a few rivers are lakesAll rivers are oceanAll oceans are streamConclusion: All stream being lakes is a possibilityAt least some oceans are riversIf only conclusion 1 followIf neither conclusion 1 nor conclusion 2 followsIf conclusion 1 and 2 both followIf only conclusion 2 follows

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Solution

The answer is "If conclusion 1 and 2 both follow".

Here's why:

  1. "All stream being lakes is a possibility": This is possible because all rivers are oceans and all oceans are streams. Since only a few rivers are lakes, it means there is a possibility that some streams (which include rivers and oceans) could be lakes.

  2. "At least some oceans are rivers": This is true because the statement says "All rivers are ocean". This means there are definitely some oceans that are rivers.

So, both conclusions follow the given statements.

This problem has been solved

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