Normally, according to the speed calculation rules for dodging or reacting to attacks, the character being calculated must be significantly faster than the attacker. For example, if A dodges B's attack, A must clearly be much faster than B, or the feat must explicitly demonstrate a large speed advantage for the calculation to be accepted.
This leads me to a question. Suppose A and B have roughly comparable speeds, with A being only slightly faster. During their fight, B launches a surprise attack on A under circumstances where A has no opportunity to prepare—for example, by attacking from a blind spot or with an obstacle blocking A's line of sight. Even so, A is still able to react to or defend against the attack.
In a case like this, would this type of feat be valid for calculating A's reaction speed?

Reactions: NIK_FARIS