Semiotician: No sign is ever unambiguous

Semiotic expertise cannot unambiguously determine the meaning of a sign; it can only clarify the conditions under which one or the other meaning is more likely, the Tartu University semioticians Andreas Ventsel and Martin Oja explain. The court has commissioned a semiotician's assessment on the sign "From the river to the sea" used by several Tallinn protesters last December, who were arrested and fined by police for inciting hatred.