12.15. Comparatives and superlatives

English has the concepts of comparative adjectives and superlative adjectives which can be formed from other adjectives, either by adding the suffixes -er and -est or by using the words more and most, respectively. The Lojbanic equivalents, which can be made from any brivla, are lujvo with the tertau zmadu, mleca, zenba, jdika, and traji. In order to make these lujvo regular and easy to make, certain special guidelines are imposed.

We will begin with lujvo based on zmadu and mleca, whose place structures are:

Example 12.86. 

zmadu: z1 is more than z2 in property z3 in quantity z4

mleca: m1 is less than m2 in property m3 in quantity m4

For example, the concept young is expressed by the gismu citno, with place structure

Example 12.87. 

citno: c1 is young

The comparative concept younger can be expressed by the lujvo citmau (based on the veljvo citno zmadu, meaning young more-than).

Example 12.88. 

mi citmau do lo nanca be li xa
I am-younger-than you by one-year multiplied-by the-number six.

I am six years younger than you.

The place structure for citmau is

Example 12.89. 

z1=c1 is younger than z2=c1 by amount z4

Similarly, in Lojban you can say:

Example 12.90. 

do citme'a mi lo nanca be li xa
You are-less-young-than me by one-year multiplied-by the-number six.

You are six years less young than me.

In English, more comparatives are easier to make and use than less comparatives, but in Lojban the two forms are equally easy.

Because of their much simpler place structure, lujvo ending in -mau and -me'a are in fact used much more frequently than zmadu and mleca themselves as selbri. It is highly unlikely for such lujvo to be construed as anything other than implicit-abstraction lujvo. But there is another type of ambiguity relevant to these lujvo, and which has to do with what is being compared.

For example, does nelcymau mean X likes Y more than X likes Z, or X likes Y more than Z likes Y? Does klamau mean: X goes to Y more than to Z, X goes to Y more than Z does, X goes to Y from Z more than from W, or what?

We answer this concern by putting regularity above any considerations of concept usefulness: by convention, the two things being compared always fit into the first place of the seltau. In that way, each of the different possible interpretations can be expressed by SE-converting the seltau, and making the required place the new first place. As a result, we get the following comparative lujvo place structures:

Example 12.91. 

nelcymau: z1, more than z2, likes n2 by amount z4

selnelcymau: z1, more than z2, is liked by n1 in amount z4

klamau: z1, more than z2, goes to k2 from k3 via k4 by means of k5

selklamau: z1, more than z2, is gone to by k1 from k3 via k4 by means of k5

terklamau: z1, more than z2, is an origin point from destination k2 for k1's going via k4 by means of k5

(See Chapter 11 for the way in which this problem is resolved when lujvo aren't used.)

The ordering rule places the things being compared first, and the other seltau places following. Unfortunately the z4 place, which expresses by how much one entity exceeds the other, is displaced into a lujvo place whose number is different for each lujvo. For example, while nelcymau has z4 as its fourth place, klamau has it as its sixth place. In any sentence where a difficulty arises, this amount-place can be redundantly tagged with vemau (for zmadu) or veme'a (for mleca) to help make the speaker's intention clear.

It is important to realize that such comparative lujvo do not presuppose their seltau. Just as in English, saying someone is younger than someone else doesn't imply that they're young in the first place: an octogenarian, after all, is still younger than a nonagenarian. Rather, the 80-year-old has a greater ni citno than the 90-year-old. Similarly, a 5-year-old is older than a 1-year-old, but is not considered old by most standards.

There are some comparative concepts which are in which the se zmadu is difficult to specify. Typically, these involve comparisons implicitly made with a former state of affairs, where stating a z2 place explicitly would be problematic.

In such cases, it is best not to use zmadu and leave the comparison hanging, but to use instead the gismu zenba, meaning increase (and jdika, meaning decrease, in place of mleca). The gismu zenba was included in the language precisely in order to capture those notions of increase which zmadu can't quite cope with; in addition, we don't have to waste a place in lujvo or tanru on something that we'd never fill in with a value anyway. So we can translate I'm stronger now not as

Example 12.92. 

mi ca tsamau
I now am-stronger.

which implies that I'm currently stronger than somebody else (the elided occupant of the second or z2 place), but as

Example 12.93. 

mi ca tsaze'a

I increase in strength.

Finally, lujvo with a tertau of traji are used to build superlatives. The place structure of traji is

Example 12.94. 

t1 is superlative in property t2, being the t3 extremum (largest by default) of set t4

Consider the gismu xamgu, whose place structure is:

Example 12.95. 

xa1 is good for xa2 by standard xa3

The comparative form is xagmau, corresponding to English better, with a place structure (by the rules given above) of

Example 12.96. 

z1 is better than z2 for xa2 by standard xa3 in amount z4

We would expect the place structure of xagrai, the superlative form, to somehow mirror that, given that comparatives and superlatives are comparable concepts, resulting in:

Example 12.97. 

xa1=t1 is the best of the set t4 for xa2 by standard xa3.

The t2 place in traji, normally filled by a property abstraction, is replaced by the seltau places, and the t3 place specifying the extremum of traji (whether the most or the least, that is) is presumed by default to be the most.

But the set against which the t1 place of traji is compared is not the t2 place (which would make the place structure of traji fully parallel to that of zmadu), but rather the t4 place. Nevertheless, by a special exception to the rules of place ordering, the t4 place of traji-based lujvo becomes the second place of the lujvo. Some examples:

Example 12.98. 

la djudis. cu citrai lo'i lobypli

Judy is the youngest of all Lojbanists.

Example 12.99. 

la .ainctain. cu balrai lo'i skegunka

Einstein was the greatest of all scientists.