Initio Data Quality | Ab

Change is allowed. Silent change is not. Your first principle is: Schema version is part of the data identifier. events_v2.parquet is a different entity than events_v1.parquet . Never mutate; deprecate.

You enforce quality at the point of creation or ingestion. If a record doesn’t meet the first principles of your domain (e.g., timestamp cannot be in the future; customer_id must match a regex), it is rejected immediately. The rule: Do not allow a known violation to enter your persistent storage. Ever. 2. The "Nullable Integer" Paradox Let’s look at a classic first-principles failure: Nulls in numeric fields. ab initio data quality

Ab initio (Latin for "from the beginning") means starting from first principles. In a quantum simulation, you don't patch errors later—you define the laws of physics upfront. If your initial conditions are wrong, the simulation is worthless. Change is allowed