"[Putin] is 100, more than 100% rational person. When he negotiates, when he starts explaining, when he makes an offer, saying "yes" or "no", he is super, super rational. As they say in Hungarian, "cold-blooded." You know, cold-blooded, reserved. You know, very careful, punctual, prepared. You know, disciplined. So negotiating and being ready for them is a real challenge if you want to maintain an equal intellectual and political level with him."