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Full disclosure: This crystal ball appears to be a prototype, and carries no warranty.
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This is a prototype and we hope it will lead to more.
(The pair pictured here is a prototype, and not yet available for sale).
Every building is a prototype, and things have to change as they go along.
These folks threw money at you when all you had was a prototype and a good idea.
"It's a prototype and you have to walk before you run," said Mike Biddle, a spokesman for the National Missile Defense Office.
A Treasury spokesman said this 2012 version had just been a prototype and after research it was decided to simplify the summaries.
The new method is still in need of validation; the vest used by Dr. Rudy is a prototype, and much clinical testing lies ahead.
Apparently this part is a prototype and leaked out of a random factory.
No markings – this was a prototype – and the keyboard ran on two AA batteries.
However, the program was a prototype, and lacked several capabilities that rendered it incompetent on current science.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com