A more thorough explanation:

in quantum valeat

in quantum valeat is a Latin phrase that means "for what it is worth." It is often used in historical contexts.

• The ancient text is difficult to interpret, but in quantum valeat, it suggests that the civilization had advanced knowledge of astronomy.
• The old document is damaged and incomplete, but in quantum valeat, it provides some insight into the daily life of people in the Middle Ages.

These examples show how in quantum valeat is used to acknowledge the limitations of historical sources. The phrase is often used when interpreting incomplete or ambiguous information. It suggests that the information may not be entirely reliable, but it is still useful for gaining some understanding of the past.