Premise: The Whitechapel murders were committed in or near the impoverished Whitechapel district in the East End of London between 3 April 1888 and 13 February 1891. At various points some or all of these eleven unsolved murders of women have been ascribed to the notorious unidentified serial killer known as Jack the Ripper.
Hypothesis: The article states "some or all of these eleven murders" were ascribed to Jack the Ripper, but from the article we cannot tell how many women The Ripper murdered.