2021-10-23
<img src="https://gyazo.com/2989837741f5ebac476040ea758bcb39/thumb/1000" alt="image">
 - <a href="/en/What%20you%20thought%20was%20one%20concept%20is%20two%20nested%20concepts">What you thought was one concept is two nested concepts</a> and joined
<ul>
<li>2021-11-05
 - It would also merge with the figure [Both &quot;is X&quot; and &quot;is not X&quot; are compatible.<ul>
<li>In short, the area between these sets is the gray area.<ul>
<li><img src="https://gyazo.com/6bf57b6e1a0f5e1580b0a0ca247ae264/thumb/1000" alt="image"></li>
</ul>
</li>
</ul>
</li>
</ul>
2019-01-26
<img src="https://gyazo.com/f2e767fc8c040dc73a6010639be133ae/thumb/1000" alt="image">
 - The <a href="/en/usefulness">usefulness</a> of defining the <a href="/en/boundary">boundary</a> of the <a href="/en/concept">concept</a>.
 - In the figure, two people are disputing the boundary of concept X.
 - They dispute whether the black circle case near the boundary is included in X.
 - Would that argument be useful?
<ul>
<li>Suppose it is clear that the white circle is included in X<ul>
<li>Even if the boundary of X is not clear, we can use the fact that the white circle is included in X</li>
<li>Isn&#39;t <a href="/en/over-quality">over-quality</a> trying to clarify the boundaries of X?</li>
</ul>
</li>
</ul>
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The usefulness of defining the boundaries of a concept