First conditional or conditional I refers to a pattern used in predictive conditional sentences, i.e. those that concern consequences of a probable future event (see Types of conditional sentence).irst conditional or conditional I refers to a pattern used in predictive conditional sentences, i.e. those that concern consequences of a probable future event (see Types of conditional sentence).
Each federal agency is required to have blind samples (i.e., negative samples, positive samples, 1  adulterated samples, substituted samples) submitted along with the donor specimens. The. blind samples may be purchased by the federal agency and supplied to the collector, or.
The opposite of a blind trial is an open trial. Blind experiments are an important tool of the scientific method, in many fields of researchâ medicine, psychology and the social sciences, natural sciences such as physics and biology, applied sciences such as market research, and many others.