In middle school, I was awarded an aptly titled “I Can Swim” badge as well as a couple of incredibly unimpressive certificates. That was the extent of my time swimming until earlier this week. Spoilers; I didn't drown.
Despite being relatively inactive as a youngster, given the opportunity as an adult, I can perform what could generously be described as swimming. That is to say, under ideal conditions, I can propel myself from one end of a pool to the other without touching the bottom. If inclined, I can even make it back; although I suppose it would be much harder vertically.
Despite this newly discovered ability, I wouldn't feel confident swimming while fully clothed at, lets say, a Tough Mudder event. Something to bear in mind.