Household leg,Individual leg,Combined P(collision) H-01 (SSN Last 4 + Phone),I-01 (First Name + DOB); Last Name retained as non-scored corroboration,2.0e-16 H-04 (ITIN Last 4 + Phone),I-01 (First Name + DOB); Last Name retained as non-scored corroboration,2.0e-16 H-02 (SSN Last 4 + Email),I-01 (First Name + DOB); Last Name* retained as non-scored corroboration,2.0e-16 H-05 (ITIN Last 4 + Email),I-01 (First Name + DOB); Last Name* retained as non-scored corroboration,2.0e-16 H-12 (Phone + ZIP),I-01 (First Name + DOB),6.0e-16 H-13 (Email + ZIP),I-01 (First Name + DOB),6.0e-16 H-14 (Phone + Street Line),I-01 (First Name + DOB),6.0e-17 H-07 (Subscriber ID + Phone),I-01 (First Name + DOB),2.0e-16 Guardian's identity (independently matched under Table 2) + Street Line,"Relationship Linkage, clinical (child-of guardian) + First Name + DOB","≈6e-13 (flat product: 0.02 × 0.0001 × 0.01 × 0.00003) — flagged: Street Line is correlated with the relationship term (same household address), so this overstates the margin; needs a dependency discount or drop Street Line before adoption" Mother's identity (independently matched under Table 2),"Relationship Linkage, clinical (newborn-of mother) + DOB + per-encounter namespace-bound birth-encounter ID",Clears with wide margin if the birth-encounter ID is a true per-encounter unique identifier — does not clear if only a shared facility ID is available; a facility ID is far above the threshold