もっともな (translations)→ believable fair just logical sound understandable
具体的な (translations)→ actual concrete definite exact positive specific substantial tangible tangibly visible
現実的 (translations)→ real substantive true
思慮深い (translations)→ careful circumspect thoughtful
事務 (translations)→ clerical serve
手のこんだ (translations)→ complicated devious
無駄がない (translations)→ economical economy