Unlike rocks, all and

a) are expensive, are difficult to get.

b) occur naturally, have a fixed chemical composition.

c) contain metal, dissolve in acid.

d) fracture, contain silica

When an experimenter draws a conclusion that he assumes will apply to all situations set up similarly to his test situation, even though he cannot possibly have examined all possible test scenarios, the experimenter is using deductive reasoning inductive reasoning abductive reasoning subjective reasoning