The event bush is a new method of artificial intelligence proposed specially tomeet the needs of geosciences, from basic research to communication with nonprofessionals.First results of its application as well as combination of event bush withmathematical and logical formalisms are encouraging, and the method has shown someadvantages to existing approaches, as well as an ability to unite them and become acomplex integrated methodology. However, since the very first steps, it turned out that theway of thinking that underlies event bush differs from virtually all existing pathways ofthought perceived in the Earth sciences. This paper aims to provide the practical guidelinesfor building event bushes. For this, it describes the method through an example, chosen tobe clear to any geoscientist and even non-scientist. The procedure of inference in the eventbush is considered in positional (graphic) and semantic aspects. Interrelations of event bushwith existing formalisms and ways of thinking are discussed. Recommendations areformulated to make the best use of event bushes in practical reasoning.