Wolff claims that something comes to be established as a fact in science
a. when everyone knows it is true and cannot be counted as rational to deny it.
b. when it is featured in research written in a socially accepted format and published in a respectable, peer-reviewed journal and gets continually cited and written about.
c. when a statement about the world comes to be established as a scientific fact that is established through observation. when it explodes an existing paradigm.
d. Both (a) and (c).