| AYER | Vienna Circle philosopher who wrote Language, Truth, and Logic (4) |
| AJAYER | British philosopher who wrote "Language, Truth and Logic" |
| LSAT | It has "arguments" and "logic games" sections |
| OATH | "I promise to tell the truth, the whole truth and nothing but the truth," for one |
| TINA | Brown who wrote "The Palace Papers: Inside the House of Windsor-the Truth and the Turmoil" (2022) |
| GATE | Where you might encounter two guards, one who only tells the truth and one who only lies |
| TUTU | Desmond _, chair of 1995 Truth and Reconciliation Commission (4) |
| NENE | Leakes who was a panelist on To Tell the Truth and Fashion Police |
| LIEN | Economical with the truth and fiction ultimately, right? (4) |
| SAHL | He quipped "Washington couldn't tell a lie, Nixon couldn't tell the truth, and Reagan can't tell the difference" |
| CARNAP | Philosopher who was a founding member of the Vienna Circle and wrote The Logical Structure of the World (6) |
| LOGICALPOSITIVISM | Philosophical theory of the Vienna Circle |
| POPPER | Associate of Vienna Circle providing drug |
| LOGICAL | School of philosophy that grew from the discussions of a group called the "First Vienna Circle" (7,10) |
| POSITIVISM | School of philosophy that grew from the discussions of a group called the "First Vienna Circle" (7,10) |
| PROLOG | The name of which 1970s computer language was formed from the words programming and logic? (6) |
| INFERENCE | Conclusion based on evidence and logic |
| TRIVIUM | "Grammar, rhetoric and logic", singular subject for medieval University quiz night? |
| RHETORIC | Part of the trivium, along with grammar and logic |
| MATHY | Skilled with numbers and logic, informally |
