unemotional, non-emotional, unsentimental, emotionless, impassive, nonchalant, cool, collected, calm, cool, calm, and collected, unruffled, unperturbed, composed, self-possessed, level-headed, self-controlled, temperate, sober, placid, equable, tranquil, serene, unexcitable, unflappable
objective, detached, neutral, disinterested, uninvolved, impersonal, impartial, non-partisan, non-discriminatory, unbiased, unprejudiced, open-minded, fair, fair-minded, just, equitable, balanced, even-handed, unselfish
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