Parsing error "for" vs "in"

[dweberlj]

When parsing "set a timer for 2 minutes" will fail but "set a timer in 2 minutes" will pass. Any idea why the word "for" vs "in" would cause the parser to give different results?

[BtM909]

for would imply a duration, whereas in talks about a specific time (in the future). Do you want to have the same result or should for give a duration from now until 2 minutes in the future?