If Jiffy Peanut Butter and Stouffer's Stove Top Stuffing have been changed to Jif Peanut Butter and Stove Top Stuffing (a product of General Foods) in old TV commercials, why couldn't persistent contrails have been added into old photos?
I wasn't familiar with the products
@Z.W. Wolf mentioned (maybe Jiffy Peanut Butter and Stouffer's Stove Top Stuffing were the real thing, the YouTube ads nefariously manipulated), so for others who don't know these products, Jif Peanut Butter and General Food's Stove Top Stuffing were the real things. Jif products were never named or advertised as "Jiffy", Stouffer never made an instant stuffing mix.
"Why Some People Swear Jif Peanut Butter Was Once Called Jiffy", The Takeout website
https://www.thetakeout.com/2002069/jiffy-peanut-butter-jif-mandela-effect/ 25 October 2025, Moriah House.
The writer proposes that some people who misremember "Jiffy" have confused/ combined the names of Jif and Skippy peanut butter.
"Did Stouffer's Stove Top Stuffing Exist? It Did Not – Here's Why", Cooks Dream website
https://cooksdream.com/did-stouffers-stovetop-stuffing-exist/ , updated 18 July 2024, "Anna".
Both articles mention the Mandela Effect.
Probably all of us misremember things and no-one has perfect recall. The internet enables people who have the same or similar mistaken views to be aware of each other; some make the mistake of interpreting other's accounts that chime with their own as evidence that they are correct, a confirmation bias. They might not test their "evidence", and if aware of conflicting evidence those prone to conspiratorial thinking sometimes seem to think the contrary evidence is manufactured in bad faith. Why a peanut butter manufacturer or the authors/ publishers of the Berenstain Bears would do this isn't really explained.
"Chemtrail" believers sometimes claim that, while conventional contrails exist (this isn't reasonably deniable), they are not as persistent as
chemtrails. So any persistent contrail is in fact a chemtrail. Evidence for persistent contrails, which might be photographic, in literature or simply people's recollections, has to be ignored or dismissed. But the evidence for persistent contrails of well-understood, non-sinister origin is overwhelming, and dates back to at least the 1920s, e.g. this account of a relatively small propellor aircraft,
This is the item from U.S. Air Service, July 1921, from
https://commons.wikimedia.org/wiki/File:Contrail_1921.jpg
External Quote:
An altitude flight was made in the morning at McCook Field (Dayton, Ohio) recently by Liet. J.A. Macready in a La Pere with supercharged Liberty. When the airplane reached a height of 26,000-27,000 feet at 11:50 a.m., a long feathery streamer was observed forming behind a rapidly-moving dark speck. ...After 20 minutes the streamer had drifted and spread until it merged indistinguishably with the other cirrus clouds visible.
See also thread
Debunking "Contrails don't Persist" with a Study of 70 Years of Books on Clouds"