* If somebody something shows (''"They showed that"''), then the terms like ''"it might be theoretically possible"'' and conditional sentence ''"if it can be"'' become surplus. On the other hand, if it is not sure ''"if it can be"'' or not, then the expression ''"They showed"'' is clearly a [[lie]]. | * If somebody something shows (''"They showed that"''), then the terms like ''"it might be theoretically possible"'' and conditional sentence ''"if it can be"'' become surplus. On the other hand, if it is not sure ''"if it can be"'' or not, then the expression ''"They showed"'' is clearly a [[lie]]. |