What RedFlag saw in Bill Clinton's 1998 Lewinsky denial
← All articles · By the RedFlag team · September 26, 2026
On January 26, 1998, at a White House event, President Bill Clinton wagged his finger at the cameras: “I did not have sexual relations with that woman, Miss Lewinsky.” We analyzed Clinton's own 41 seconds on camera (0:56–1:37 of the AP Archive footage; the opening shows the room and Vice President Gore, so it was cut to keep the analysis on one speaker). RedFlag is not a lie detector — it measures where a speaker's voice and face diverge from their own baseline and leaves the interpretation to you.
The public record is settled. On August 17, 1998, after grand-jury testimony, Clinton admitted on national television to an “inappropriate” relationship with Monica Lewinsky. This clip is also one of the hand-labeled reference videos RedFlag's scoring is regression-tested against — so it is the clip we know best.
The analyzed video
RedFlag's analysis of the clip. The screen turns red during flagged moments, a green bar marks stretches within normal range, and the counter climbs as each flag is caught.
Overlay rendered from the analyzer's own output for this clip (same pipeline as the app's capture mode). Original clip: YouTube ↗.
What RedFlag flagged
Across the clip, RedFlag flagged 2 moments totalling 12 seconds. Each flagged episode lasts at least 3 seconds; shorter blips are dropped as measurement noise.
| # | Timestamp | Length |
|---|---|---|
| 1 | 0:14 – 0:21 | 7s |
| 2 | 0:32 – 0:37 | 6s |
What the signals did
| Signal | Flagged moments | Rest of the clip |
|---|---|---|
| Pitch variability (F0 semitone SD; normal band 2.3–4.5) | 1.59 st | 2.25 st |
| Blink rate | 16.02/min | 11.99/min |
| Voiced continuity | 0.18 | 0.14 |
Two moments were flagged, and the first — 0:14 to 0:21 in this segment — contains the famous line itself (“I'm going to say this again: I did not have sexual relations with that woman”). During the flagged stretches Clinton's pitch variability fell to 1.59 semitones against 2.25 in the rest of the segment, under the 2.3–4.5 band typical of engaged speech. His blink rate ran about 34% above his own baseline (16.0 vs 12.0 per minute), and his voiced continuity rose (0.18 vs 0.14) — he talked through the moment rather than pausing. RedFlag's verdict is pitch-anchored, with blink and voicing changes relative to the speaker's own baseline adding weight; thresholds are public in the scoring method.
What this does and does not mean
It does not mean the analyzer detected a lie. Flattened pitch, blink changes and unusual voicing all have innocent causes — rehearsal, fatigue, a hostile room, a hard question. The honest reading is narrower: at these moments, this speaker's delivery deviated from his own baseline in a measurable, repeatable way. What that meant is a judgment, and here the public record has already made it.
Run your own. Paste any public YouTube interview with a single speaker into the analyzer — free, no signup, in your browser. RedFlag charts the signals; what they mean stays your call.
Open the analyzerSources
- Analysis run: RedFlag analyzer (capture pipeline), September 2026, on YouTube luLpdr4n8m4. Figures are the analyzer's own per-slot output.
- Clinton's August 17, 1998 televised address (summary ↗).
- Reference-label testing: methodology §6.
- Scoring method and thresholds: How RedFlag scores a video.