A handshake between Vladimir Putin and a health expert has sparked debate over his health as eagle-eyed viewers spotted bulging veins in his hands and unusual fist-clenching. Putin, 73, met with Yekaterina Leshchinskaya, 22, the chair of the Russian Healthy Fatherland movement, to discuss the possibility of banning the sale of e-cigarettes in the country when the marks on his hands were noticed. As he reached to shake the woman's hand, the Russian leader's right hand was seen with visible bulgin

Lecture 11: Rules and Introduction to Expert Systems