Assertion: psoriasis's cause | /r/HasProperty | unclear
Facets:
Source sentences:
text: While the cause of psoriasis is still unclear, scientists believe that it is an autoimmune disease.
text: The cause is unclear, but there's a known link between PPP and smoking.
text: Although the exact cause is unclear, many believe that it develops as a result of faulty immune activity.
text: Causes and triggers The exact cause of the condition is unclear, but it appears to involve both genetic and environmental factors.