Our paper describes the use of the program gnostical "t-TESTS", or more exactly said, its first simple version. This program takes all advantages which the gnostical approach gives, i.e., testing for multiplicative or additive data, robust testing, testing without knowledge of data-distribution, testing in the case when extremely few data items are at our disposal and testing with maximized acquired information. This program includes both two-files tests and one-file tests. Appropriate decision making algorithms can be outstandingly efficient at data evaluation in biological and medicine research and to users can receive quite a new quality of data evaluation. Some demonstrations of real data from medical practice are shown.