exists function on list objects gives always a FALSE

SmoothData$span is not an object which can be checked by exists(), but
part of an object which can be checked by is.null().
Dear R-users,

in a minimal example exists() gives FALSE on an object which obviously does
exist. How can I check on that list object anyway else, please?

SmoothData <- list(exists=TRUE, span=0.001)
SmoothData
$exists
[1] TRUE

$span
[1] 0.001

exists("SmoothData")
TRUE

exists("SmoothData$span")
FALSE

exists("SmoothData[[2]]")
FALSE

Thank you for any opinion regarding this topic.
Zroutik

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exists function on list objects gives always a FALSE

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