4 Contradicted by research
A trained violinist shifting their finger on a string by one micron produces a change in pitch that the human ear can perceive.
"if you have a trained violinist, if they move their finger by only a micron, so that's a millionth of a meter, the ear can perceive that as a change in pitch." (said at 0:08:43)
The claim is contradicted by the basic physics of string instruments and human auditory psychoacoustics. A standard violin string has a vibrating length of approximately 325–330 mm. A 1-micrometer (0.001 mm) shift in finger position alters the vibrating length by about 0.0003% (roughly 1 part in 330,000), which corresponds to a pitch shift of only ~0.005 cents (or about 0.0013 Hz at A440). In contrast, the human just-noticeable difference (JND) or frequency difference limen for pitch—even among elite trained musicians under ideal laboratory conditions—is typically 3 to 10 cents (roughly 0.2% to 0.5% in frequency, or about 1–2 Hz), which requires a finger displacement on the order of 0.5 to 1.5 millimeters (~1,000 times larger than a micron).
Wearing inverting prism glasses causes the perceived visual field to flip right-side up after an adaptation period of continuous wear.
"where people would wear inverting glasses. So they put on glasses and then for a couple days the entire world looks upside down... but actually the brain just flips the image back. It it does a complete reversal" (said at 1:04:18)
The claim that continuous wear of inverting prism glasses causes the brain to perceptually flip the visual scene back right-side up is a widespread misconception ('the myth of upright vision'). Psychophysical and functional neuroimaging studies demonstrate that while wearers develop substantial visuomotor and sensorimotor adaptation (enabling them to navigate and perform motor tasks), the visual scene remains perceived as inverted, and retinotopic organization in early visual cortical areas does not reinvert.
- contradicts: The myth of upright vision. A psychophysical and functional imaging study of adaptation to… (Perception 1999) · cited 87x in the literature
"Subjects showed rapid adaptation of visuomotor functions, but did not report return of upright vision. The persistence of the transformed visual image was confirmed by the subjects' perception of shape from shading. No alteration of the retinotopy of early visual cortical areas was seen in the functional magnetic resonance images." (abstract, results, passage verified)
pubmedfull study (doi) - context: Long-term adaptation to prism-induced inversion of the retinal images. (Experimental brain research 2002) · cited 24x in the literature
"It is suggested that these results reflect an improved attentional (strategic) ability to replace incorrect (error producing) control signals with correct (error reducing) control signals. As a result, perceptual-motor start-up processes directly related to spatial coding and to the planning, initiation and correction of the intended direction of motor-or-mental movement improved while the subprocess ("stage") concerned with transformations of such movements remained unchanged." (abstract, results, passage verified)
pubmedfull study (doi) - context: Adapting to inversion of the visual field: a new twist on an old problem. (Experimental brain research 2013) · cited 59x in the literature
"Our experimental data corroborate the classic observation that subjects reduce their motor errors under inverted vision. Subjects' accuracy initially worsened and then improved. However, improvement was jagged rather than smooth and performance remained unstable even after 8 days of continually inverted vision, suggesting that subjects improve via an unknown mechanism, perhaps a combination of cognitive and implicit strategies." (abstract, results, passage verified)
pubmedfull study (doi)
Acetaminophen belongs to the class of non-steroidal anti-inflammatory medications (NSAIDs).
"And all of those drugs in that category, non-steroidal anti-inflammatory medications. That includes acetaminophen as well." (said at 2:07:15)
Acetaminophen (paracetamol) does not belong to the non-steroidal anti-inflammatory drug (NSAID) class. In pharmacology and clinical medicine, NSAIDs (such as ibuprofen, naproxen, and aspirin) and acetaminophen are categorized as distinct classes of non-opioid analgesics. While both provide analgesic and antipyretic effects, acetaminophen lacks significant peripheral anti-inflammatory properties and does not exhibit the classic peripheral cyclooxygenase inhibition mechanisms characteristic of NSAIDs.
Waldeyer's ring in the head and neck lymphatic system includes the adenoid, tonsils, and cervical lymph nodes.
"There is a very dense lymphatic system in the head and neck region. We even call it Waldeyer's ring. It includes the adenoid, which is the gland that sits at the back of the nose, plus the tonsils that sit at the back of your throat, plus all of these lymph nodes throughout the head and neck region." (said at 2:12:23)
Anatomically, Waldeyer's ring (Waldeyer's lymphatic ring) refers specifically to the annular arrangement of mucosa-associated lymphoid tissue (MALT) located in the upper aerodigestive tract, comprising the pharyngeal tonsil (adenoids), tubal tonsils, palatine tonsils, and lingual tonsils. It does not include cervical lymph nodes or the general network of lymph nodes throughout the head and neck, which are distinct secondary lymphoid organs that drain lymph from Waldeyer's ring and surrounding structures.
Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.