冷靜的,腳踏實地的,無懈可擊的
hardheaded adj 1: unreasonably rigid in the face of argument or entreaty or attack [syn: {mulish}] 2: guided by practical experience and observation rather than theory; "a hardheaded appraisal of our position"; "a hard-nosed labor leader"; "completely practical in his approach to business"; "not ideology but pragmatic politics" [syn: {hard-nosed}, {practical}, {pragmatic}]