What does Hippolyta mean in this speech from Act V Scene I of *A Midsummer Night's Dream*?

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> But all the story of the night told over,  
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>  And all their minds transfigured so together,  
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>  More witnesseth than fancy’s images  
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>  And grows to something of great constancy,  
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>  But, howsoever, strange and admirable.
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