
Sometimes, it’s not a lack of skill that hurts someone’s credibility—it’s the way they talk about themselves. Certain phrases, even tossed off casually, can quietly chip away at how competent they seem. The words may sound harmless, but they send the wrong message fast. Here are 10 that do exactly that.
“That’s Not My Job”

When someone says, “That’s not my job,” it signals low accountability and poor team adaptability. Managers often associate it with low-performing employees. Some businesses monitor such phrases in internal messages, underlining that this approach isn’t welcome in a collaborative and productive work culture.
“It’s Always Been Done This Way”

If you want to stop innovation in its tracks, just say, “It’s always been done this way.” It is considered one of the top creativity blockers. Apple’s leadership once used this phrase as a red flag in hiring, and it’s commonly cited as a top reason why legacy systems fail.
“I Already Know That”

here’s nothing quite like “I already know that“ to slam the brakes on learning. The phrase is linked to overconfidence and poor learning outcomes, ultimately making it the enemy of growth. Those using it regularly may miss essential information, whereas top performers tend to avoid saying it.
“I’ll Try”

While “I’ll try” may sound like a soft commitment, behavioral science tells us it’s a weak one. People who express “I’ll try” are less likely to follow through on tasks. Yoda’s famous “Do or do not” quote perfectly aligns with the principle that definitive action words lead to better results.
“I Can’t Help It”

Saying “I can’t help it“ often stems from a low sense of self-efficacy and an external locus of control. Such a mindset affects adults and children alike, with kids who use such phrases frequently facing lasting struggles with problem-solving and personal growth.
“Whatever”

Nothing is more dismissive than a well-timed “Whatever.“ The phrase is regarded as one of the least professional expressions you can use, as it conveys disinterest. Even worse, saying “whatever” can escalate conflicts significantly, turning minor disagreements into full-blown showdowns.
“It’s Not My Fault”

Blame-shifting with phrases like this is a sign of low emotional intelligence, especially in leadership roles. This type of language damages team cohesion and fosters a toxic work environment. Interestingly, children who are taught to take ownership of their mistakes develop stronger executive function later in life.
“I’m Just Being Honest”

Used as an excuse for rudeness instead of offering constructive feedback, such language reveals a lack of social awareness and empathy, which can harm relationships with colleagues. Those who use this expression are viewed as less trustworthy, further highlighting the importance of thoughtful word choice.
“That’s Impossible”

When someone says, “That’s impossible,” they shut down problem-solving in their brain, as negative framing can trigger a response that stifles motivation. Neuroscience shows that using such language diminishes creativity. In fact, some Silicon Valley incubators have banned it outright.
“I Guess”

Indecisive language like this can make someone appear less authoritative in group settings. It’s a phrase commonly used by people who lack confidence in the subject at hand. Interestingly, high-level professionals, such as lawyers and executives, are trained to avoid such phrases altogether.