The term critical appraisal is identified in base64 scheme by the sequence Y3JpdGljYWwgYXBwcmFpc2Fs, while the MD5 signature is equal to 0c61e32813cf83939a54d5ca393cbb13. The ASCII encoding of critical appraisal in hexadecimal notation is 637269746963616c2061707072616973616c.