Particle interpretation of 後でも


I've been puzzling over this sentence from the (excellent) Kanji in Context.

昔は、スポーツをして汗をかいた後でも水分をとってはいけないと言われていた。

I get that it means "In the past, I was told not to drink water (even) after
doing sports and sweating."

Do we interpret the particle usage as 後で＋も (afterwards + even) or 後＋でも (after
+ even/although)? The second one seems better, as the first one seems to imply
I was told not to drink water under any circumstances.




でも not merely consists of で+も accidentally, it is a combination of で and も,
and has then grown beyond the sum of its parts. Still, its meaning has not
shifted completely, and so it should not be surprising that we can come across
some phrases where both interpretations work. (Also それでも, it can be analyzed
both ways.)

Note that this is not the でも that can go sentence-initial, "But...".

(Going slightly off-topic, it is my opinion that developing an understanding
for how words and different meanings of a word are related helps to develop a
feeling for the language.)

Perhaps not under any circumstances whatsoever, but
「スポーツをして汗をかいた後でも水分をとってはいけない」 is a pretty strong (negative) command, or
introducing a rule the student is expected to observe. でも is responsible for
"not even", てはいけない for the commanding part.

I am not certain whether asking if it is (by native speakers) analyzed as でも
or で+も is a question that can answered objectively, but perhaps it might prove
to be of interest to consider whether ~ででも is possible. If a speaker does not
perceive the で in でも anymore, he might feel the need to insert the particle で
again.

This has happened with 他の, and you can see people saying 「他のの」. For example,
[「また、物の成分本質（原材料）が薬事法上食品に使用可能なものであっても、他ののいずれかが医薬品的であれば製品を「医薬品」と判断します。」](http://www.fukushihoken.metro.tokyo.jp/kenkou/kenko_shokuhin/ken_syoku/kanshi/)




でも not merely consists of で+も accidentally, it is a combination of で and も,
and has then grown beyond the sum of its parts. Still, its meaning has not
shifted completely, and so it should not be surprising that we can come across
some phrases where both interpretations work. (Also それでも, it can be analyzed
both ways.)

Note that this is not the でも that can go sentence-initial, "But...".

(Going slightly off-topic, it is my opinion that developing an understanding
for how words and different meanings of a word are related helps to develop a
feeling for the language.)

Perhaps not under any circumstances whatsoever, but
「スポーツをして汗をかいた後でも水分をとってはいけない」 is a pretty strong (negative) command, or
introducing a rule the student is expected to observe. でも is responsible for
"not even", てはいけない for the commanding part.

I am not certain whether asking if it is (by native speakers) analyzed as でも
or で+も is a question that can answered objectively, but perhaps it might prove
to be of interest to consider whether ~ででも is possible. If a speaker does not
perceive the で in でも anymore, he might feel the need to insert the particle で
again.

This has happened with 他の, and you can see people saying 「他のの」. For example,
[「また、物の成分本質（原材料）が薬事法上食品に使用可能なものであっても、他ののいずれかが医薬品的であれば製品を「医薬品」と判断します。」](http://www.fukushihoken.metro.tokyo.jp/kenkou/kenko_shokuhin/ken_syoku/kanshi/)

