Preposition: of

• century: He is one of the most important logicians of the 20 th Century.

Adjective modifier

• mathematical: Raymond Smullyan, a mathematical logician, composed a number of chess problems of a very different type from those usually composed.

• great: Rom Harr, in The Independent, called Popper " the last of the great logicians " .

• relevant: At this point some confusion is natural about what relevant logicians have attempted to do.

• medieval: Medieval logicians also discussed the relation of logic to grammar.

• deontic: Almost all deontic logicians have accepted Menger's verdict.

• formal: At the unusually late age of 38 Prior had become a formal logician.

Noun used with modifier

• century: William of Occam, a 14th century logician, wrote " Entities should not be multiplied unnecessarily.