Final answer:
Using Liquid's json filter, it's true that you can convert a JSON string back to a Liquid object; however, the specific filter for this operation is parse_json.
Step-by-step explanation:
The statement that you can convert a JSON string to a Liquid object using Liquid's json filter is true. In Liquid templating, the json filter is designed to take a Liquid object and output it as a JSON string. However, the reverse process, which involves parsing a JSON string back into a Liquid object, is typically achieved using the parse_json filter. This filter reads a JSON string and converts it into a Liquid-readable format, allowing you to access and manipulate the data within a Liquid template.