When the outputs of two inverters are wired together, the result is a two-input NOR gate because the configuration (NOT A) AND (NOT B) is equivalent to NOT (A OR B) (per De Morgan's Theorem).
When two inverters are connected, they form a two-input NOR gate. This configuration can be represented as (NOT A) AND (NOT B), which is equivalent to NOT (A OR B) according to De Morgan's Theorem.