| speculative |
| thinking(adjective, sound, reasonable, sensible, reasoning) |
| valid(adjective, clear, sound, logical, systematic) |
| wise(adjective, clear, sound, reasonable, sensible) |
| convincing(adjective, clear, sound, logical) |
| congruent(adjective, clear, sound, logical) |
| deducible(adjective, clear, sound, logical) |
| discerning(adjective, clear, sound, reasonable, sensible) |
| germane(adjective, clear, sound, logical) |
| inferential(adjective, clear, sound, logical) |
| kosher(adjective, clear, sound, informal, logical) |
| legit(adjective, clear, sound, informal, logical) |
| lucid(adjective, clear, sound, reasonable, sensible) |
| necessary(adjective, clear, sound, logical) |
| normal(adjective, sound, reasonable, sensible, reasoning) |
| obvious(adjective, clear, sound, logical) |
| perceptive(adjective, clear, sound, sensitive, intelligent) |
| pertinent(adjective, clear, sound, logical) |
| relevant(adjective, clear, sound, logical) |
| sane(adjective, sound, reasonable, sensible, rational) |