Off spin Indian spin quartet - E. A. S. Prasanna and Srinivas Venkataraghavan, also Harbhajan Singh and Ravichandran Ashwin of India, Saqlain Mushtaq and Saeed Ajmal of Pakistan, Jim Laker and Graeme Swann of England. Saqlain Mushtaq was credited with the invention of the "doosra", which is bowled with a similar-looking action to the off break but spins the opposite way, just as the leg spinner's googly turns the opposite way from his stock ball. Off spin Off spin is a type of finger spin bowling in the sport of cricket. A bowler who uses this technique is called an off spinner.
Square of opposition on both terms in particular claims (I and O), but allowing all terms of universal claims (A and E) to lack existential import. This decision made Venn diagrams particularly easy to use for term logic. The square of opposition, under this Boolean set of assumptions, is often called the modern Square of opposition. In the modern square of opposition, A and O claims are contradictories, as are E and I, but all other forms of opposition cease to hold; there are no contraries, subcontraries, or subalterns. Thus, from a modern point of view, it often makes sense to talk about