Details matter.

Don't risk belief in a story being suspended or abandoned because the reader knows you, the writer,  got something wrong. (I write about this elsewhere in my Blog.) When I think about researching details for a novel, or play, these lines from a poem come to mind: 
"Pray for the grace of accuracy
Vermeer gave to the sun’s illumination
stealing like the tide across a map
to his girl solid with yearning.
We are poor passing facts,
warned by that to give
each figure in the photograph
his living name." (from "Epilogue" by Robert Lowell)