Why Can't Nigel Spell?

“Computer spell checks have created an ‘auto-correct generation’ unable to spell common words such as ‘necessary’ and ‘separate’, a survey has found. Only one in five adults out of 2,000 who took a short spelling test were able to answer all five questions correctly. Sixty-five per cent failed to spell ‘necessary’ correctly while 33 per cent struggled with ‘definitely’ and ‘separate’.”
 — I mess up “separate” all the time, so who am I to judge? I also have a surprising lifelong conflict with “recommend.”