From 7-9 January at the Univercity of Wrocław a conference How categorical are categories? Took place. An essey entitled ‘The category of tense in three dimensions: The case of Polish Sign Language’ by dr Paweł Rutkowski, Joanna Łacheta, Sylwia Łozińska, and Piotr Mostowski was presented. It is concerned with the contemporary studies of the grammatical category of tense in PJM (Polish Sign Language) which are conducted by the Section for Sign Linguistics (PLM).