A conspiracy board was a visual depiction of a conspiracy theory, complete with photographs of involved parties, yarn strung between the images to show their relationship, and any relevant documents.
In 2380, a paranoid Beckett Mariner created a conspiracy board to illustrate her wild imaginings about Barbara Brinson's possible sinister motives for a romantic relationship with Brad Boimler, as well as speculations about her true nature. (LD: "Cupid's Errant Arrow")
In 2381, the Truther recruitment booth on Tulgana IV featured a conspiracy board. (LD: "Reflections")