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Confidence is a wonderful trait to have. However, too much of it can make one’s head swell. While this might sound similar to a verse from a didactic children’s book, it’s true. Overconfidence causes people to overestimate their abilities and knowledge, which are often far from reality. And we know there are few things that netizens like to do more than ridicule these instances online.

So we gathered a whole list of them, courtesy of Confidently Incorrect subreddit. Scroll down to find the most hilarious times cocky people got things totally wrong, and be sure to upvote the ones that deservingly got torn apart by the overconfidence police.

#1 Everybody Can Run 7 Minute Miles

Image credits: r_special_

#2 Red Blood Cells Are Not Real Cells

Image credits: bumblebleebug

#3 Facebook Always Provides

Image credits: epsilon14254

Many behaviors of humans have been observed, investigated and named, and overconfidence is no exception. People who think a little too highly of themselves are known to experience overconfidence bias.

“Overconfidence bias occurs when individuals overestimate their abilities, knowledge, or control over situations,” explains Dr. Ozan Toy, MD, MPH.

#4 I Can Prove 0.999… Doesn’t Exist! Step 1: .999… = 1-1-0

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#5 You’d Have To Be Drunk To Be That Wrong. We Literally Evolved Into Tolerating Naturally Fermented Fruits, Then Learned To Make Our Own From Grains

Image credits: Neolithique

#6 Physical Isn’t Actually Assault

Image credits: PerhapsNotMaybeSo

A great example of this most of us can relate to is students overestimating how quickly they can finish an assignment. After realizing the task takes longer than expected, they are, unfortunately, forced to pull an all-nighter.

Or when we set other overly ambitious goals, like promising to work out and eat healthy every day without excuses. The motivation instantly plummets to zero after it becomes clear that such perfection may be impossible to achieve. This is overconfidence bias in action for you.

#7 Yikes

Image credits: Temporary-Wrap-6094

#8 Someone Skipped Biology

Image credits: MickeySwank

#9 Comments In Response To Someone Saying That 10 Years Is 15% Of Your Life

Image credits: Nucleuh_Powuh

Such beliefs occur due to cognitive biases, which are patterns of thinking that interpret reality subjectively rather than relying on facts and rational judgment. It affects how we process information and make decisions, resulting in flawed reasoning, like overestimating knowledge and abilities.

Psychologist Dillon Harper, PhD, also suggests that overconfidence is our brain’s attempt at boosting our self-esteem and reducing anxiety. By minimizing or ignoring our failures and focusing on past successes, it makes us more relaxed and sure of ourselves.

#10 The Amount Of Likes Is Scary

Image credits: EvelKros

#11 Tiktok Kids These Days

Image credits: Maddi-The-Baddi

#12 I Emailed Hr After Noticing A Pay Error. This Was Their Response

Image credits: Zeptic

Our brain’s tendency to convince us that we are better than we actually are can be boosted by our lack of experience, as we don’t have enough knowledge to accurately evaluate our abilities. Another factor that plays a part in this is our upbringing.

“Overconfidence bias is often the result of what we call ‘false empowerment’ in childhood,” says licensed marriage and family therapist Renée Zavislak. “Parents who consistently tell their children things like, ‘You’re the best’ and ‘You are good at everything you do’ rather than true, realistic compliments like, ‘Yours is my favorite’ and ‘I am proud of you,’ tend to foster the development of an overconfidence bias.”

#13 Apparently We Are Not Animals

Image credits: CarpenterWeary2724

#14 He Really Said That With His Whole Chest

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#15 Is This Really What Americans Are Like?

Image credits: KittyboiYT2

Due to these factors, many people have excessive faith in themselves. Research shows that 73% of U.S. drivers believe to be better than average, which is statistically impossible. A study with spelling tasks found participants to be 100% sure of their answers but 80% of them were actually right.

Additionally, a whopping 65% of Americans think they’re smarter than average, with the figure being even higher when it comes to men. These are just a few examples proving that no one is safe from experiencing overconfidence bias, just like these people on this list.

#16 Just… No

Image credits: ExpertAccident

#17 “You’ve Gotten Off Lucky”. The Smugness Is Killing Me

Image credits: Kira_Bad_Artist

#18 *you’re

Image credits: FightingTable

Thinking highly of ourselves can affect our daily behaviors and decisions. “When we overestimate our abilities, it’s like walking a tightrope with a blindfold. We’re more likely to take unnecessary risks, ignore important feedback, or skip preparation because we think we’ve got it all under control,” Dr. Harper says.

“When things don’t go as planned, the fall from that high can be harsh, leading to disappointment and a hit to our self-esteem.”

It can also negatively impact relationships, as few people like overconfidence that leans towards arrogance.

#19 Not How Percentages Or Averages Work

Image credits: sudosciguy

#20 Asexual

Image credits: Z2_U5

#21 It’s Spelled Frunk

Image credits: Indigo-au-naturale

Knowing when you’re overpushing your faith in yourself can be difficult. Therefore, we all should aim to be realistic. “It’s important to acknowledge that no one is perfect. We’ve all experienced failure at some point, and often, these failures are crucial to our growth and evolution,” says therapist Racheal Turner, LPC. “When we overestimate our abilities and leave no room for improvement, we do ourselves a disservice by assuming we’re the best at everything.”

#22 A Silly Person Not Understanding Physics

Image credits: samprich

#23 So… I Guess There Are No Real Tests For Any Illnesses At All?

Image credits: professorearl

#24 You Are Parents Failed You?

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Even if we have skills and possess talent, we should never stop learning and do better. Some additional tips that help to avoid becoming the victim of overconfidence are to ask other people’s perspectives, question our choices, and seek out other points of view by diversifying our information sources.