People who use these 7 phrases in conversation have a lower IQ than they think, according to psychology

The smartest person in my graduate seminar never spoke above a whisper. While the rest of us performed intellectual peacocking—dropping references to Foucault, using “paradigmatic” in casual conversation—she asked simple questions that revealed the gaps in our elaborate arguments. “What do you mean by that?” she’d say, and watch our carefully constructed theoretical frameworks collapse like card houses.

Years later, I understood what she already knew: the people most convinced of their intelligence often reveal its limits through their language. Not through mispronunciations or grammatical errors, but through specific phrases that betray a fundamental misunderstanding of how intelligence actually works—phrases that suggest they’ve mistaken confidence for competence, volume for value, contrarianism for critical thinking.

The Dunning-Kruger effect isn’t just about incompetent people overestimating their abilities. It’s about how we all have blind spots in our self-assessment, particularly when we’re performing intelligence rather than practicing it. The phrases that follow aren’t just linguistic tells—they’re windows into a mindset that confuses intelligence with its opposite: the inability to recognize the limits of one’s own understanding.

1. “I’m just being logical” / “You’re being too emotional”

The person who announces their monopoly on logic usually understands neither logic nor emotion. They’ve created a false binary where they occupy the rational high ground while everyone else wallows in the valley of feelings. What they miss is that emotional intelligence is intelligence, that understanding human behavior requires recognizing emotion as data, not noise.

I watched this play out in a team meeting where a colleague dismissed concerns about employee morale as “emotional reactions” to “logical business decisions.” He couldn’t see that predicting and managing human responses—emotional or otherwise—was itself a logical imperative. His “logic” operated in a vacuum, divorced from the reality that businesses are human systems, not mathematical equations.

People who trumpet their logic while dismissing others’ emotions reveal a particularly narrow form of intelligence—one that can process abstract concepts but fails at the complex task of understanding actual human behavior. They’re like someone claiming to be a master chef while insisting that taste is irrelevant to cooking.

2. “I’ve done my own research”

This phrase has become the rallying cry of people who’ve confused Google searches with genuine inquiry. They’ve “researched” vaccines by reading blog posts, “studied” economics through YouTube videos, become “experts” on climate science via Facebook debates. They mistake information consumption for knowledge construction, not understanding that research is a discipline, not a hobby.

Real researchers understand the hierarchy of evidence, the importance of peer review, the difference between correlation and causation. They know that doing research means questioning sources, understanding methodology, recognizing the limits of individual studies. The person who’s “done their own research” typically means they’ve found sources that confirm what they already believed.

What’s particularly telling is the possessive “my own”—as if research is a personal journey rather than a collective enterprise of knowledge-building. It reveals a fundamental misunderstanding of how expertise develops: not through isolated internet searches but through years of study, peer review, and the humbling recognition of how much you don’t know.

3. “Actually, if you really think about it…”

This conversational override suggests that everyone else has been thinking superficially while they alone have achieved true depth. It’s the verbal equivalent of pushing to the front of a line, assured that your thoughts deserve priority boarding. The phrase assumes others haven’t “really” thought, that surface-level thinking is the norm from which they’re the exception.

I once counted how many times someone used this phrase during a book club discussion. Seven times in an hour, each introduction preceding an observation that was either obvious or wrong. What they presented as deep thinking was usually just contrarianism, the mistaking of reflexive disagreement for intellectual rigor.

The truly intelligent recognize that most people have thought about things, often deeply. They approach conversations with curiosity about others’ thinking rather than assumptions about its absence. They ask “What led you to that conclusion?” rather than announcing that real thinking is about to begin.

4. “People are sheep”

Nothing announces intellectual insecurity quite like declaring everyone else a mindless follower. This phrase reveals someone who’s confused cynicism with wisdom, who believes that dismissing humanity en masse somehow elevates them above it. They stand on their self-built pedestal, looking down at the “sheep,” not realizing they’re just as likely to be following—just different shepherds.

The person who calls others sheep typically gets their worldview from alternative sources that are just as curated, just as biased, just as limited as the mainstream they reject. They’ve simply chosen different information filters, different echo chambers, different ways of following the crowd while believing they’re walking alone.

True intelligence recognizes the complexity of human behavior, understands that people make decisions based on various factors—circumstance, information, values, constraints. Dismissing everyone as sheep is intellectually lazy, a way to avoid the harder work of understanding why people believe and behave as they do.

5. “I’m brutally honest”

People who advertise their brutal honesty are usually more interested in brutality than truth. They’ve confused rudeness with righteousness, mistaking the absence of social grace for the presence of intellectual courage. They deliver cruelty and call it clarity, as if the pain they cause is proof of their truth-telling.

“I’m just being honest,” a former colleague would say after insulting someone’s work, appearance, or ideas. But honesty without context, compassion, or purpose isn’t intelligent—it’s primitive. A truly intelligent person understands that effective communication requires more than just stating facts; it requires understanding how those facts will be received, what purpose they serve, whether they help or harm.

The intelligent recognize that honesty and kindness aren’t mutually exclusive, that truth can be delivered with care, that the goal of communication is understanding, not wounding. The person who prides themselves on brutal honesty often lacks the intellectual sophistication to be both truthful and constructive.

6. “Common sense isn’t common”

This phrase, delivered with a knowing smile, suggests the speaker possesses rare wisdom that escapes ordinary mortals. They’ve appointed themselves arbiters of the obvious, judges of what everyone should know but somehow doesn’t. What they call “common sense” is usually their particular perspective, shaped by their specific experiences, masquerading as universal truth.

Common sense varies dramatically across cultures, contexts, and circumstances. What’s “obvious” to someone raised in one environment might be revolutionary to someone from another. The truly intelligent understand that common sense is contextual, that different life experiences lead to different “obvious” conclusions.

People who lament the absence of common sense are often frustrated that others don’t share their assumptions. They mistake their worldview for the worldview, not recognizing that intelligence partly means understanding that multiple valid perspectives exist—that sense isn’t common because experience isn’t uniform.

7. “I tell it like it is”

This cousin of “brutal honesty” suggests that the speaker has unique access to objective reality while everyone else traffics in distortion. They position themselves as the sole clear channel in a world of static, the only one brave enough to speak unfiltered truth.

But “how it is” is rarely as simple as they suggest. Reality is complex, multifaceted, often contradictory. The person who claims to “tell it like it is” usually means they tell it like they see it, without recognizing the limitations of their perspective. They mistake their interpretation for fact, their opinion for truth.

Intelligence involves recognizing that “how it is” depends on where you’re standing, what you’re measuring, whom you’re asking. It means understanding that truth is often complicated, that certainty should decrease as complexity increases, that the most honest thing is often to acknowledge what you don’t know.

Final thoughts

These phrases don’t indicate low IQ in the traditional sense—many people who use them score perfectly well on standardized tests. What they reveal is a different kind of intellectual limitation: the inability to recognize the boundaries of their own understanding, the failure to appreciate the intelligence of others, the confusion of confidence with competence.

The paradox of intelligence is that the more you have, the more you recognize its limits. The truly brilliant are haunted by what they don’t know, humbled by the complexity they perceive. They approach conversations with curiosity rather than certainty, questions rather than pronouncements.

My quiet seminar colleague went on to become a renowned researcher. I once asked her about her reticence in those early discussions. “I was listening,” she said. “Everyone was so certain about everything. I kept thinking I must be missing something, that surely it couldn’t all be as unclear as it seemed to me.” Her uncertainty, it turned out, was the truest intelligence in the room—the recognition that real wisdom begins with knowing what you don’t know.

The phrases we’ve examined aren’t just linguistic quirks—they’re symptoms of a broader intellectual failing: the dangerous conviction that we see clearly while others stumble in darkness. True intelligence recognizes that we’re all stumbling, just in different directions, and that the smartest thing might be to admit we need each other’s perspectives to find our way.