She Tested It. They Ignored It. The Women Who Invented Knowledge Before Science Had a Name.

In the late 1400s, two women were doing something radical: generating knowledge and insisting it counted. Margery Kempe was building an evidence base for her divine visions. Caterina Sforza was annotating her alchemical recipes with "proven and certain." They never met, but they were solving the same problem. One manuscript was found in a ping-pong cupboard in 1934. The other is still missing.

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