There’s one grammatical error that, for some reason, always makes my blood boil in this forum. The fault lies with me, of course, for letting such a small thing affect me, and certainly not with the writer.
It’s about using the word “lienee” (probably/it seems) as an auxiliary verb. “Lienee” is only the potential form of the verb “olla” (to be). It conjugates according to person like this:
minä lienen (I might be)
sinä lienet (you might be)
hän lienee (he/she/it might be)
me lienemme (we might be)
te lienette (you (plural) might be)
he lienevät (they might be)
It is used incorrectly as an auxiliary verb like this: Matti and Maija lienee ehtivät seuraavaan junaan. (Matti and Maija probably manage to catch the next train.)
In reality, every verb has its own potential form. The sentence should go like this: Matti and Maija ehtinevät seuraavaan junaan. (Matti and Maija might manage to catch the next train.) The forms are: ehtinen, ehtinet, ehtinee, ehtinemme, ehtinette, ehtinevät.
Often, potential forms are really clunky, which can make using them correctly difficult. A good rule of thumb is that you can never go wrong by using a circumlocution (I think that… perhaps, etc.)
A couple more examples. The first is wrong, and the second is correct.
Lienee otatko huomioon, että… / Ottanetko huomioon, että… (Do you perhaps take into account that… / Will you perhaps take into account that…)
Tulos lienee laskee ensi vuonna / Tulos laskenee ensi vuonna (The result will probably decrease next year / The result might decrease next year)
Osinko lienee menee maksuun lokakuussa / Osinko mennee maksuun lokakuussa (The dividend will probably be paid in October / The dividend might be paid in October)