| No. | Item | Definition |
|---|---|---|
| 1. | agnostic | undecided about truth or belief |
| 2. | ambivalent | having mixed feelings or doubts |
| 3. | analytical | examining claims carefully |
| 4. | arguable | open to debate or doubt |
| 5. | astute | clever and discerning |
| 6. | careful | cautious in judgment or action |
| 7. | cautious | careful before believing or acting |
| 8. | chary | cautious and wary |
| 9. | circumspect | careful and wary before deciding |
| 10. | conflicted | torn between opposing views |
| 11. | contestable | open to dispute or challenge |
| 12. | critical | inclined to judge or examine carefully |
| 13. | cynical | distrustful of motives or sincerity |
| 14. | difficult to credit | hard to believe as true |
| 15. | diffident | lacking confidence in judgment |
| 16. | disbelieving | not accepting something as true |
| 17. | distrustful | having little or no trust |
| 18. | distrusting | not trusting someone or something |
| 19. | dodgy | informally doubtful or unreliable |
| 20. | doubtful | inclined to question or disbelieve |
| 21. | doubting | questioning truth or reliability |
| 22. | dubious | uncertain and inclined to doubt |
| 23. | equivocal | uncertain or not clearly committed |
| 24. | evidence-minded | requiring evidence before belief |
| 25. | exacting | requiring high standards or proof |
| 26. | fact-checking | checking truth before accepting |
| 27. | faltering | uncertain and hesitant |
| 28. | far-fetched | difficult to believe |
| 29. | fastidious | hard to satisfy or convince |
| 30. | fishy | informally suspicious or doubtful |
| 31. | flimsy | weak and unconvincing |
| 32. | full of doubt | strongly uncertain or questioning |
| 33. | guarded | careful and not fully trusting |
| 34. | hard to believe | difficult to accept as true |
| 35. | hard to convince | not easily persuaded |
| 36. | hard to swallow | difficult to accept or believe |
| 37. | hard-nosed | tough-minded and unsentimental |
| 38. | hardheaded | practical and not easily fooled |
| 39. | hesitant | slow to accept or act |
| 40. | iffy | informally uncertain or doubtful |
| 41. | implausible | not seeming likely or believable |
| 42. | improbable | not likely to be true |
| 43. | in doubt | uncertain about truth or value |
| 44. | incredulous | unable or unwilling to believe |
| 45. | indecisive | not firm in decision or belief |
| 46. | inquiring | seeking information or answers |
| 47. | irresolute | unable to decide confidently |
| 48. | jaded | cynically tired and hard to impress |
| 49. | judicious | showing careful, sound judgment |
| 50. | leery | wary or suspicious |
| 51. | levelheaded | calm and sensible in judgment |
| 52. | mistrustful | lacking trust or confidence |
| 53. | noncommittal | not expressing firm belief |
| 54. | not buying it | informally refusing to believe |
| 55. | not convinced | not persuaded something is true |
| 56. | not credible | not believable or trustworthy |
| 57. | not persuaded | not won over or convinced |
| 58. | observant | noticing details before believing |
| 59. | open to challenge | not beyond dispute or doubt |
| 60. | open to question | able to be doubted or challenged |
| 61. | particular | selective and hard to satisfy |
| 62. | perceptive | quick to notice and judge |
| 63. | picky | informally hard to satisfy |
| 64. | probing | questioning deeply or carefully |
| 65. | problematic | raising doubts or difficulties |
| 66. | proof-seeking | wanting proof before believing |
| 67. | prudent | careful and sensible in judgment |
| 68. | questionable | open to doubt or challenge |
| 69. | questioning | inclined to ask or challenge |
| 70. | rationally doubtful | doubtful for reasonable reasons |
| 71. | realistic | practical and not overly trusting |
| 72. | reserved | restrained in judgment or trust |
| 73. | rigorous | careful and thorough in evaluation |
| 74. | sceptical | British spelling of skeptical |
| 75. | shady | suspicious or not trustworthy |
| 76. | shaky | uncertain or weakly supported |
| 77. | skeptic-minded | inclined to question claims |
| 78. | slow to believe | reluctant to accept as true |
| 79. | slow to trust | reluctant to place confidence |
| 80. | suspect | doubtful or not fully trustworthy |
| 81. | suspicious | inclined to suspect or distrust |
| 82. | tentative | not fully certain or settled |
| 83. | thin | weak or lacking support |
| 84. | torn | divided by uncertainty or doubt |
| 85. | tough-minded | practical and not easily swayed |
| 86. | unassured | not confident or convinced |
| 87. | unbelieving | not believing something presented |
| 88. | uncertain | not sure about truth or outcome |
| 89. | unconfident | lacking confidence or certainty |
| 90. | unconvinced | not persuaded or satisfied |
| 91. | undecided | not having reached a conclusion |
| 92. | unresolved | not settled or decided |
| 93. | unsettled | not decided or firmly believed |
| 94. | unsure | not certain or confident |
| 95. | untrusting | not readily trusting others |
| 96. | vacillating | shifting between doubt and decision |
| 97. | wary | cautious because of possible risk |
| 98. | wavering | unsteady in belief or decision |
| 99. | weak | not convincing or well supported |
| 100. | worldly-wise | experienced and not easily fooled |