[b0rsuk]

I forgot to type it in that reply (hence redundant 'understand'), but also something as common as discussion. If you talk with a pedantic person he might be 100% accurate but prevent it from moving forward. This is called obstruction. What Lem was saying is obviously true, definitions of different level remain in use. Because they're useful.

I like Lem but sometimes his complex grammar and vocabulary doesn't add any value. I think it's better to describe (relatively) simple things in simple language. Lem tended to phrase everything that way.