A recent open letter called for a moratorium on the development of increasingly powerful artificial intelligence (AI) systems, highlighting the potential risks to society and humanity. The letter urged all AI labs to pause the training of AI systems more powerful than GPT-4, including GPT-5, for at least 6 months. It also called for shared safety protocols and improved AI governance. Sam Altman, the CEO of OpenAI, is a prominent figure in the AI community and his support for the open letter could influence its impact and reception.

Before April 5th, 2023, will it be verified that Sam Altman signed the recent open letter calling for a moratorium on the development of AI systems more powerful than GPT-4 (including GPT-5)?

Resolution Criteria:

This question will resolve positively if, before April 5th, 2023, credible news sources, official statements, or other verifiable evidence confirm that Sam Altman has signed the open letter, meeting the following criteria:

1. Verification of Signature: There must be clear and convincing evidence that Sam Altman himself has signed the open letter. This evidence may include, but is not limited to:
   a. A public statement from Sam Altman, either written or spoken, in which he confirms that he has signed the open letter.
   b. An official statement from OpenAI or its representatives confirming Sam Altman's signature on the open letter.
   c. A credible news source reporting on Sam Altman's signature, with sufficient details to ascertain the validity of the claim, such as quotes from Altman or his representatives.
   d. A public update to the open letter, such as a revised version or an addendum, that includes Sam Altman's name, along with accompanying evidence as outlined in points (a), (b), or (c) to verify the authenticity of his signature.

2. Unambiguous Support: Sam Altman's signature on the open letter must signify his agreement with its content and the call for a moratorium on the development of AI systems more powerful than GPT-4, including GPT-5.

If credible news sources, official statements, or other verifiable evidence confirm that Sam Altman has signed the open letter meeting the above criteria before April 5th 2023, the question will resolve positively. If no such evidence is provided by the deadline, the question will resolve negatively.