kesri experimental gismu

x1 (property of x2) is a stereotype of x2 (object/set), held by x3

Does not necessarily carry a negative connotation. Stereotypes are, basically, the characteristics that come to one's mind when they imagine a particular object, regardless of actual commonality. e.g. Many people stereotypically think of roses as red, even though there are plenty of roses that aren't red. See sei'i, lemkai, le'e

In notes:

sei'inai (comp!)
evidential: avoiding stereotypes...
x1 discriminates against (holds a negative stereotype of) x2, assigning stereotype x3
sei'i (exp!)
evidential: stereotypically...