free from error

precise

(going) straight; not curved or crooked; not turned aside

honest

(of a person) practical and realistic

practical

well known to a person

common, well-known

(of a person) showing no sign of feeling

aloof, cool

of, connected with, produced by, machines; (of a person, action) done like machines (as if) without thought

done by machine; machinelike

concerned with the process of doing something and the results; (of a person, character etc) clever at doing and making things; useful

realistic, useful

concerned with useful results, the possibility of actually being done (and not theory or principles)

sensible

dull; uninteresting; commonplace

unimaginative

having or showing good sense

realistic, reasonable

a person with great self-control when suffering difficulties, pain etc

philosophic

not exactly excited

apathetic, stupid

not having, using, imagination

dull, predictable

designed for use rather than beauty

practical