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- Verify === usage instead of == to avoid type coercion surprises with null
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ambiguous phrasing
not just single-threaded happy-path coverage.
negation
cache invalidation
not just process liveness.
load balancers
retry
type mismatch
internal paths
distributed locks
re-throw
memory store
growing caches without eviction
floating-point epsilon failures
sockets
greedy vs. lazy mismatch
underflow
array indexing
short-circuit evaluation misuse
type mapping failures
pinned versions
zero-length strings
ambiguous decision boundaries