The investor and co-founder of Y Combinator argues that real innovation arises from challenging what the industry takes for granted. His essay 'Novelty and Heresy' suggests seeking opportunities where most fear to look.
When Paul Graham, co-founder of Y Combinator, claims that the best startup ideas are heresies, he is not exaggerating. In his essay 'Novelty and Heresy', the investor asserts that genuine innovation often hides beneath assumptions that the market considers unquestionable, and those who challenge them are labelled heretics before becoming visionaries.
The correlation between novelty and heresy according to Paul Graham
Graham establishes a direct correlation: when you discover something genuinely new, there is a high probability that you will be accused of heresy. This happens because new ideas are often hidden in the shadow of erroneous assumptions to which people are emotionally attached. For an entrepreneur, this means that the most valuable opportunities lie where most are afraid to look.
The essay proposes that taboos are potential sources of innovation. Instead of avoiding controversial topics, founders should pay special attention to them. Curiosity about what "you’re not supposed to pay attention to" is where novelty often appears.
“If your business idea doesn’t discomfort anyone, it’s probably not novel enough,” summarises Graham.
The conformist test: do you have genuine opinions?
Graham introduces the “conformist test”: do you have opinions that you would be embarrassed to express in front of a group of peers? If the answer is no, you are probably just thinking what you are told. This test is crucial for founders looking to differentiate themselves in saturated markets.
To apply it in practice, the author recommends gathering the founding team and asking: “What do you think about our market that you couldn’t say in a formal meeting?” The answers will reveal unchallenged assumptions that may be limiting innovation. Creating a safe space for these opinions is the first step.
How to identify taboos and turn them into competitive advantage
Graham suggests making a list of 5 to 10 “truths” that everyone in the sector accepts without question, such as “customers always want X” or “this model doesn’t work in LATAM”. Then, spend time verifying whether each one is actually true or just an inherited assumption. Validated heresy becomes a competitive advantage.
The investor also advocates for being “aggressively open” and sensitive to the “winds of change”. Instead of following established trends, successful founders identify themes that the industry considers “incorrect” and check if there is an opportunity for innovation there. This doesn’t mean adopting controversial positions just for the sake of being different, but rigorously questioning dominant assumptions.
Real cases: from heresy to success
Historically, companies like Airbnb and Uber were considered “bad” or “dangerous” ideas by traditional investors before proving their validity. In the period 2022-2026, similar patterns have been observed in the AI sector, where unconventional approaches to model safety initially faced resistance before gaining traction.
The lesson is not that all heresy is valid, but that all significant innovation begins as heresy. The founder’s job is to distinguish between unfounded heresies and those that reveal erroneous market assumptions. In the Spanish-speaking startup ecosystem, where capital is scarcer, applying these principles can make the difference between building a “me-too” and creating something truly disruptive.
For Spanish and Latin American entrepreneurs, Graham's message is clear: if everything you believe is something you are supposed to believe, you are unlikely to be thinking independently. Copying Silicon Valley models without questioning assumptions can lead to products that do not solve real problems. Heresy, when well-managed, is the engine of innovation.
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