True, but that's more of a current snapshot than a categorical determination. It's more like the social sciences started breaking away from the humanities many decades ago, and have been increasingly pulled in the general direction of hard science ever since. Though necessarily relying much more on modeling and statistical approaches than on formal analysis.

Due to the inherent impossibility of repeating experimental conditions exactly (or in some fields, at all), the social sciences will never join the hard sciences, but instead occupy terrain adjacent to both humanities (where their data is sourced from), and hard sciences (where techniques are sourced from, increasingly for the "computational"- prefixed subfields).