handgun malfunctions - never tap, rack or rip first, CHECK first then remedy

instinctive tap and rack is a extra step if you dont check first to see that if say you have a double feed tap and racking a few times is a waste of time in a gun fight where fractions of a second matter, I am a advocate of just having a second gun but if you can only carry one gun you must CHECK visually first for a instant so you know what remedy is needed, but taking that instant to check you make no mistakes or fumble as much had you tap and rack and then rack yet again finding out to late it's a double feed, had you checked you would save time and your life because you do things the same way and set the way of doing things like cement in your memory for immediate action