The key problem with the "brain in a vat" thought experiment
Even with perfect simulation technology, meaning and context still matter.
The thought experiment asks whether we can prove we are not simulated. Philosophically it is useful, but it can also distract from practical epistemology.
Knowledge in real life depends on shared language, testable predictions, and correction over time. Those mechanisms matter more than absolute certainty.
Instead of asking whether reality is perfectly knowable, we can ask whether our methods keep improving our models.
A guest post by
Joseph Mbuzi
Psychology educator with over 3M followers, podcast host, and author.
Discussion about this post
Great article. Thank you. This is a well-structured insight into the topic and very helpful.
Great article. Thank you. This is a well-structured insight into the topic and very helpful.
The 5-hour rule: How to turn a wasted day into a successful one
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JUL 29, 2025 • BIG THINK AND JONNY THOMSON
The 5-hour rule: How to turn a wasted day into a successful one
We each have the same 24 hours in the day. How will you spend yours?
JUL 29, 2025 • BIG THINK AND JONNY THOMSON
The 5-hour rule: How to turn a wasted day into a successful one
We each have the same 24 hours in the day. How will you spend yours?
JUL 29, 2025 • BIG THINK AND JONNY THOMSON