Determining whether an ancient culture employed a numeral system with a zero is challenging.

In a spreadsheet column labeling scheme, letters run from A through Z and then AA through AZ, a system known as bijective base 26.

Researchers must examine the frequency and position of observed symbols to infer the underlying numeral system.

If a symbol never appears at the beginning of a number, it may represent zero, but a small sample size can make this conclusion unreliable.

With only 20 examples, the absence of a symbol at the start of numbers does not prove it is never used first.

Larger collections of numbers increase confidence in such inferences.

If a symbol corresponds to the base value, such as 20, the system cannot be bijective because a single symbol would represent the base.

Statistical methods like Benford’s law can suggest digit distribution, yet practical decoding relies on contextual evidence, such as consecutive numbers or known meanings.

Without contextual clues, deciphering ancient numeral systems remains speculative.