"All Cretans are liars", said Epimenides, a Cretan. But this means that his statement must be a lie too. But then it is false that Cretans are liars and the statement must be true. So what now?

*Symbols in Algebra* (1961) is an **11-minute educational film** produced by Coronet. Through **animation and special film techniques**, the film explains how **algebraic symbols** allow us to ...