LOG(0)stop visuals from rendering. Can it instead return an error to the visual, like LOG(BLANK())?

[JeffWeir]

LOG(0) stop visuals from rendering. Can it instead return an error to the visual? e.g. LOG(BLANK()) returns -Infinity.

Also, I noticed that placement of an IFERROR statement around a variabe return doesn't supress the error, as shown below left, whereas putting it within the variable does, as shown below right. Is this related? 

[v-chuncz-msft]

@JeffWeir 

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