Reclassify thematic dataset

[Maya007]

I read in some instructions that it is safer to reclassify with codes like value in the reclass dialogue box  instead of fields like ex: Geology . Is it because there are more possibility for errors in this than in the values. I find it more easier to reclassify if it is based on descriptions like geology.

Are there some other reasons that reclassification works better with values than with fields like descriptions?

 

Thanks,

Maya.