marginal knowledge
[ˈmɑːrdʒɪnəl ˈnɒlɪdʒ]
noun
conhecimento marginal
1. superficial or incomplete understanding of a subject; knowledge that is limited to the edges or periphery of a topic rather than its core
His marginal knowledge of physics prevented him from solving the advanced problem.
Seu conhecimento marginal de física o impediu de resolver o problema avançado.
2. awareness or familiarity with a subject that is minimal or barely sufficient
She had only marginal knowledge of French, enough to order a coffee but not to hold a conversation.
Ela tinha apenas conhecimento marginal de francês, o suficiente para pedir um café, mas não para manter uma conversa.
3. understanding limited to peripheral aspects of a discipline without mastery of fundamental concepts
The consultant's marginal knowledge of the industry made his recommendations unreliable.
O conhecimento marginal do consultor sobre o setor tornou suas recomendações pouco confiáveis.
This term is commonly used in academic, professional, and educational contexts in both Brazil and the USA to distinguish between genuine expertise and superficial familiarity. In Brazilian Portuguese, it's often used critically to evaluate someone's qualifications or credibility in specialized fields. The phrase reflects the value placed on depth of knowledge in formal settings.
NYC Slang
surface-level knowledge / half-baked understanding
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