 It is in this sense that Global Reductionists think that testimonial justification can be reduced to a combination of perceptual, memorial, and inferential justification. That is, testimonial justification can be reduced to a combination of other epistemic sources because it only involves you (i) perceiving that the speaker made an utterance (ii) remembering that when people have told you things in the past, they turned out to be right most of the time and (iii) inferring on this basis that what you were told on this occasion is likely to be true.