Copyright Coincidence
My dad was a patent and trademark attorney about 10 years ago and worked for a pharmaceutical company. Hilariously enough, the owner of the company adopted the slogan “Just Do It”, somehow not knowing that the trademark belonged to Nike. When the owner found out that the trademark belonged to one of the biggest companies in the world, rather than change the slogan and avoid a lawsuit, he CALLS UP NIKE and expresses how funny he thinks it is that they have the same slogan.
My dad got them to settle the case and the catchphrase was later changed.
Story credit: Reddit / AndWeWilledHim